anchor.diff:      node.target?.accept(this);
       startNullAwareIndexExpression(node);
   
  -    var resolver = PropertyElementResolver(this);
  -    var result = resolver.resolveIndexExpression(
  +    var result = _propertyElementResolver.resolveIndexExpression(
         node: node,
         hasRead: true,
         hasWrite: false,
  
positive.code:   late final SimpleIdentifierResolver _simpleIdentifierResolver =
        SimpleIdentifierResolver(this, flowAnalysis);
  
    /// Initialize a newly created visitor to resolve the nodes in an AST node.
    ///
    /// The [definingLibrary] is the element for the library containing the node
  
negative.code:     node.target?.accept(this);
      startNullAwarePropertyAccess(node);
  
      var result = _propertyElementResolver.resolvePropertyAccess(
        node: node,
        hasRead: true,
        hasWrite: false,
  