code: function (aNode, sourceBuffer, owner) {
          elementSourceCompiler.tagStart(sourceBuffer, aNode);
          elementSourceCompiler.inner(sourceBuffer, aNode, owner);
          elementSourceCompiler.tagEnd(sourceBuffer, aNode);
      }
docs: 编译普通节点
  
  @param {ANode} aNode 节点对象
  @param {CompileSourceBuffer} sourceBuffer 编译源码的中间buffer
  @param {Component} owner 所属组件实例环境
  @param {Object} extra 编译所需的一些额外信息