code: function( graphics, styles ){
  
              if ( Physics.util.isObject(styles) ){
  
                  if ( styles.fillStyle && styles.fillStyle !== 'transparent' ){
                      graphics.beginFill( styles.fillStyle );
                      graphics.fillAlpha = styles.fillAlpha !== undefined ? styles.fillAlpha : 1;
                  } else {
                      graphics.beginFill();
                      graphics.fillAlpha = 0;
                  }
  
                  graphics.lineStyle( styles.lineWidth || 0, styles.strokeStyle, styles.strokeAlpha !== undefined ? styles.strokeAlpha : 1 );
                  graphics.alpha = styles.alpha !== undefined ? styles.alpha : 1;
  
              } else {
  
                  if ( styles && styles !== 'transparent' ){
                      graphics.beginFill( styles );
                  } else {
                      graphics.beginFill();
                      graphics.fillAlpha = 0;
                  }
  
                  graphics.lineStyle( 0 );
              }
  
              return graphics;
          }
docs: PixiRenderer#setStyles( graphics, styles ) -> PIXI.Graphics
  - graphics (PIXI.Graphics): The graphics object to set styles on
  - styles (Object): The styles configuration
  + (PIXI.Graphics): A graphic object
  
  Set styles on pixi graphics object