code: func (c *DOM) GetOuterHTML(nodeId int, backendNodeId int, objectId string) (string, error) {
  	var v DOMGetOuterHTMLParams
  	v.NodeId = nodeId
  	v.BackendNodeId = backendNodeId
  	v.ObjectId = objectId
  	return c.GetOuterHTMLWithParams(&v)
  }
docs: // GetOuterHTML - Returns node's HTML markup.
  // nodeId - Identifier of the node.
  // backendNodeId - Identifier of the backend node.
  // objectId - JavaScript object id of the node wrapper.
  // Returns -  outerHTML - Outer HTML markup.