code: void setRotate(double angle_in_Radians, Point2D rotationCenter) {
  		setRotate(Math.cos(angle_in_Radians), Math.sin(angle_in_Radians),
  				rotationCenter);
  	}
docs: Sets this transformation to be a rotation around point rotationCenter.
  
  When the axis Y is directed up and X is directed to the right, the
  positive angle corresponds to the anti-clockwise rotation. When the axis
  Y is directed down and X is directed to the right, the positive angle
  corresponds to the clockwise rotation.
  
  @param angle_in_Radians
  The rotation angle in radian.
  @param rotationCenter
  The center point of the rotation.