code: func (c *Page) GetResourceContent(frameId string, url string) (string, bool, error) {
  	var v PageGetResourceContentParams
  	v.FrameId = frameId
  	v.Url = url
  	return c.GetResourceContentWithParams(&v)
  }
docs: // GetResourceContent - Returns content of the given resource.
  // frameId - Frame id to get resource for.
  // url - URL of the resource to get content for.
  // Returns -  content - Resource content. base64Encoded - True, if content was served as base64.