fix function variable panel issue (#2392)

* fix function variable panel issue

* fix test

src/components/ModelingSidebar/ModelingPanes/MemoryPane.test.tsx

@@ -38,7 +38,7 @@ describe('processMemory', () => {
     expect(output.otherVar).toEqual(3)
     expect(output).toEqual({
       myVar: 5,
-      myFn: undefined,
+      myFn: '__function(a)__',
       otherVar: 3,
       theExtrude: [
         {

src/components/ModelingSidebar/ModelingPanes/MemoryPane.tsx

@@ -83,6 +83,10 @@ export const processMemory = (programMemory: ProgramMemory) => {
         processedMemory[key] = val.value.map(({ ...rest }: ExtrudeSurface) => {
           return rest
         })
+      } else if ((val.type as any) === 'Function') {
+        processedMemory[key] = `__function(${(val as any)?.expression?.params
+          ?.map?.(({ identifier }: any) => identifier?.name || '')
+          .join(', ')})__`
       } else {
         processedMemory[key] = val.value
       }