code: func (c *CSS) CreateStyleSheet(frameId string) (string, error) {
  	var v CSSCreateStyleSheetParams
  	v.FrameId = frameId
  	return c.CreateStyleSheetWithParams(&v)
  }
docs: // CreateStyleSheet - Creates a new special "via-inspector" stylesheet in the frame with given `frameId`.
  // frameId - Identifier of the frame where "via-inspector" stylesheet should be created.
  // Returns -  styleSheetId - Identifier of the created "via-inspector" stylesheet.