diff --git a/ui2abc/libarkts/generator/options.json5 b/ui2abc/libarkts/generator/options.json5
index f9146ba9f958f11a8c825ba4dc8ca0465c1a5165..db68d6b98d55c266885ec4f703ca89f3ed52eb78 100644
--- a/ui2abc/libarkts/generator/options.json5
+++ b/ui2abc/libarkts/generator/options.json5
@@ -192,10 +192,14 @@
         {
             name: "ArrowFunctionExpression",
             methods: [
+                {
+                    name: "Function",
+                    types: ["returnType"]
+                },
                 {
                     name: "FunctionConst",
                     types: ["returnType"]
-                }
+                },
             ]
         },
         {
@@ -281,6 +285,10 @@
         {
             name: "MethodDefinition",
             methods: [
+                {
+                    name: "Function",
+                    types: ["returnType"]
+                },
                 {
                     name: "FunctionConst",
                     types: ["returnType"]
@@ -401,6 +409,10 @@
         {
             interface: "Program",
             methods: [
+                {
+                    name: "getAstCasted",
+                    definition: "extension_ProgramGetAstCasted",
+                },
                 {
                     name: "getExternalSources",
                     definition: "extension_ProgramGetExternalSources",
diff --git a/ui2abc/libarkts/src/arkts-api/utilities/extensions.ts b/ui2abc/libarkts/src/arkts-api/utilities/extensions.ts
index 636c127ef55a2fe37ad54facd109218e802bf030..ebe60d82114a584d8f56abcd254b2ccbf26f8d10 100644
--- a/ui2abc/libarkts/src/arkts-api/utilities/extensions.ts
+++ b/ui2abc/libarkts/src/arkts-api/utilities/extensions.ts
@@ -29,7 +29,7 @@ import type {
 import { ExternalSource } from "../peers/ExternalSource"
 import { Es2pandaModuleFlag } from "../../generated/Es2pandaEnums"
 import { global } from "../static/global"
-import { acceptNativeObjectArrayResult, passNodeArray, unpackNodeArray } from "./private"
+import { acceptNativeObjectArrayResult, passNodeArray, unpackNodeArray, unpackNonNullableNode } from "./private"
 import type { AstNode } from "../peers/AstNode"
 
 export function extension_ETSModuleGetNamespaceFlag(this: ETSModule): Es2pandaModuleFlag {
@@ -89,6 +89,11 @@ export function extension_ExpressionSetPreferredTypePointer(this: Expression, ty
     global.es2panda._Checker_ExpressionSetPreferredType(global.context, this.peer, typePointer)
 }
 
+// Improve: weird API
+export function extension_ProgramGetAstCasted(this: Program): ETSModule {
+    return unpackNonNullableNode<ETSModule>(global.generatedEs2panda._ProgramAst(global.context, this.peer))
+}
+
 // Improve: generate methods with string[] args or return type
 export function extension_ProgramGetExternalSources(this: Program): ExternalSource[] {
     return acceptNativeObjectArrayResult<ExternalSource>(
diff --git a/ui2abc/libarkts/src/generated/factory.ts b/ui2abc/libarkts/src/generated/factory.ts
index 530293ff5dec7fc3e1868b22ffc1ad3a09b69569..75a80ebfe14ec558d18c548838a60666ba0e99d3 100644
--- a/ui2abc/libarkts/src/generated/factory.ts
+++ b/ui2abc/libarkts/src/generated/factory.ts
@@ -1208,11 +1208,11 @@ export const factory = {
         return updateNodeByNode(SequenceExpression.createSequenceExpression(sequence), original)
     }
     ,
-    createArrowFunctionExpression(_function?: ScriptFunction, annotations?: readonly AnnotationUsage[]): ArrowFunctionExpression {
+    createArrowFunctionExpression(_function: ScriptFunction, annotations?: readonly AnnotationUsage[]): ArrowFunctionExpression {
         return ArrowFunctionExpression.createArrowFunctionExpression(_function, annotations)
     }
     ,
-    updateArrowFunctionExpression(original: ArrowFunctionExpression, _function?: ScriptFunction, annotations?: readonly AnnotationUsage[]): ArrowFunctionExpression {
+    updateArrowFunctionExpression(original: ArrowFunctionExpression, _function: ScriptFunction, annotations?: readonly AnnotationUsage[]): ArrowFunctionExpression {
         if (isSameNativeObject(_function, original.function) && isSameNativeObject(annotations, original.annotations))
             return original
         return updateNodeByNode(ArrowFunctionExpression.createArrowFunctionExpression(_function, annotations), original)
diff --git a/ui2abc/libarkts/src/generated/peers/ArrowFunctionExpression.ts b/ui2abc/libarkts/src/generated/peers/ArrowFunctionExpression.ts
index 28a32ae1afac82e79827aa364a5739cdf9423586..94b9d71b03e55d57ecb96de90565beebf0843674 100644
--- a/ui2abc/libarkts/src/generated/peers/ArrowFunctionExpression.ts
+++ b/ui2abc/libarkts/src/generated/peers/ArrowFunctionExpression.ts
@@ -69,8 +69,8 @@ export class ArrowFunctionExpression extends Expression {
         result.setChildrenParentPtr()
         return result
     }
-    get function(): ScriptFunction | undefined {
-        return unpackNode(global.generatedEs2panda._ArrowFunctionExpressionFunction(global.context, this.peer))
+    get function(): ScriptFunction {
+        return unpackNonNullableNode(global.generatedEs2panda._ArrowFunctionExpressionFunction(global.context, this.peer))
     }
     get createTypeAnnotation(): TypeNode | undefined {
         return unpackNode(global.generatedEs2panda._ArrowFunctionExpressionCreateTypeAnnotation(global.context, this.peer))
diff --git a/ui2abc/libarkts/src/generated/peers/MethodDefinition.ts b/ui2abc/libarkts/src/generated/peers/MethodDefinition.ts
index b85eca1c6fd1a1be952a65fe72f090abe925d22f..e2e43fd36dee66dceebf54f6dcb2506139428990 100644
--- a/ui2abc/libarkts/src/generated/peers/MethodDefinition.ts
+++ b/ui2abc/libarkts/src/generated/peers/MethodDefinition.ts
@@ -118,8 +118,8 @@ export class MethodDefinition extends ClassElement {
         global.generatedEs2panda._MethodDefinitionSetAsyncPairMethod(global.context, this.peer, passNode(asyncPairMethod))
         return this
     }
-    get function(): ScriptFunction | undefined {
-        return unpackNode(global.generatedEs2panda._MethodDefinitionFunction(global.context, this.peer))
+    get function(): ScriptFunction {
+        return unpackNonNullableNode(global.generatedEs2panda._MethodDefinitionFunction(global.context, this.peer))
     }
     /** @deprecated */
     initializeOverloadInfo(): this {
diff --git a/ui2abc/libarkts/src/generated/peers/Program.ts b/ui2abc/libarkts/src/generated/peers/Program.ts
index a1d31feb5e84534965961ea87585d80561b71bb7..889487fb27ecd2cd8a4a9e578f87bb2e6b486d5c 100644
--- a/ui2abc/libarkts/src/generated/peers/Program.ts
+++ b/ui2abc/libarkts/src/generated/peers/Program.ts
@@ -38,6 +38,7 @@ import { Es2pandaModuleKind } from "./../Es2pandaEnums"
 import { Es2pandaProgramFlags } from "./../Es2pandaEnums"
 import { Es2pandaScriptKind } from "./../Es2pandaEnums"
 import { SourcePosition } from "./SourcePosition"
+import { extension_ProgramGetAstCasted } from "./../../reexport-for-generated"
 import { extension_ProgramGetExternalSources } from "./../../reexport-for-generated"
 
 export class Program extends ArktsObject {
@@ -196,6 +197,7 @@ export class Program extends ArktsObject {
         global.generatedEs2panda._ProgramAddFileDependencies(global.context, this.peer, file, depFile)
         return this
     }
+    getAstCasted = extension_ProgramGetAstCasted
     getExternalSources = extension_ProgramGetExternalSources
     protected readonly brandProgram: undefined
 }