code: void scanNewNodes(Set<AstChange> newNodes) {
      BuildGlobalNamespace builder = new BuildGlobalNamespace();
  
      for (AstChange info : newNodes) {
        if (!info.node.isQualifiedName() && !NodeUtil.mayBeObjectLitKey(info.node)) {
          continue;
        }
        scanFromNode(builder, info.module, info.scope, info.node);
      }
    }
docs: If the client adds new nodes to the AST, scan these new nodes to see if they've added any
  references to the global namespace.
  
  @param newNodes New nodes to check.