docs: function WebGLBatch(gl)
  {
      this.gl = gl;
  
      this.size = 0;
  
      this.vertexBuffer =  gl.createBuffer();
      this.indexBuffer =  gl.createBuffer();
      this.uvBuffer =  gl.createBuffer();
      this.colorBuffer =  gl.createBuffer();
      this.blendMode = blendModes.NORMAL;
      this.dynamicSize = 1;
  }