Class PxPane

The dom element.

For leaflet it's a div which wrap a canvas, a svg, and many images,...

For Pixi, it's just a canvas.

If this pane is managed by manager.

the manager who manages this pane

the name of this pane, used as the key of dict for fast indexed read.

the display order in DOM tree. it affects the z-index finally.

If the pane is a proxy.

The renderer on this pane. one pane, one renderer, and cannot change after initialized.

For leaflet, it may be L.Canvas or L.SVG.

For Pixi, it has to be Canvas.

If the pane is visible, we use display: none to hide it.