lib/leaflet.js
function (coords) {

		var map = this._map,
		    tileSize = this.getTileSize(),

		    nwPoint = coords.scaleBy(tileSize),
		    sePoint = nwPoint.add(tileSize),

		    nw = map.wrapLatLng(map.unproject(nwPoint, coords.z)),
		    se = map.wrapLatLng(map.unproject(sePoint, coords.z));

		return new L.LatLngBounds(nw, se);
	}
function (coords) {

		var map = this._map,
		    tileSize = this.getTileSize(),

		    nwPoint = coords.scaleBy(tileSize),
		    sePoint = nwPoint.add(tileSize),

		    nw = map.wrapLatLng(map.unproject(nwPoint, coords.z)),
		    se = map.wrapLatLng(map.unproject(sePoint, coords.z));

		return new L.LatLngBounds(nw, se);
	}
function ( coords ) { var map = this . _map , tileSize = this . getTileSize ( ) , nwPoint = coords . scaleBy ( tileSize ) , sePoint = nwPoint . add ( tileSize ) , nw = map . wrapLatLng ( map . unproject ( nwPoint , coords . z ) ) , se = map . wrapLatLng ( map . unproject ( sePoint , coords . z ) ) ; return new L . LatLngBounds ( nw , se ) ; }
converts tile coordinates to its geographical bounds
converts tile coordinates to its geographical bounds