This class is the base class of all gradient fillers. The desired color. String The desired color2. String The desired opacity1. String The desired opacity2. String EDIT_THIS EDIT_THIS EDIT_THIS EDIT_THIS The color1 that the filler is going to use. String The color2 that the filler is going to use. String The opacity1 that the filler is going to use for color1. Number The opacity2 that the filler is going to use for color2. Number The the x position of the center of the radial filling. Number The the y position of the center of the radial filling. Number