code: function readImageLayer(map, data, z) {
          // Normalize properties
          me.TMXUtils.applyTMXProperties(data.properties, data);
  
          // create the layer
          var imageLayer = me.pool.pull("me.ImageLayer",
              // x/y is deprecated since 0.15 and replace by offsetx/y
              +data.offsetx || +data.x || 0,
              +data.offsety || +data.y || 0,
              Object.assign({
                  name: data.name,
                  image: data.image,
                  z: z
              }, data.properties)
          );
  
          // set some additional flags
          var visible = typeof(data.visible) !== "undefined" ? data.visible : true;
          imageLayer.setOpacity(visible ? +data.opacity : 0);
  
          return imageLayer;
      }
docs: read the Image Layer Data
  @ignore