big refactor of var values for astMods

src/lang/queryAst.ts

@@ -16,6 +16,7 @@ import {
   VariableDeclaration,
   VariableDeclarator,
   sketchGroupFromKclValue,
+  ObjectExpression,
 } from './wasm'
 import { createIdentifier, splitPathAtLastIndex } from './modifyAst'
 import { getSketchSegmentFromSourceRange } from './std/sketchConstraints'
@@ -934,3 +935,12 @@ export function hasExtrudableGeometry(ast: Program) {
   })
   return Object.keys(theMap).length > 0
 }
+
+export function getObjExpProperty(
+  node: ObjectExpression,
+  propName: string
+): { exp: Expr; index: number } | null {
+  const index = node.properties.findIndex(({ key }) => key.name === propName)
+  if (index === -1) return null
+  return { exp: node.properties[index].value, index }
+}