clearTile(x, y) {
		// clearing tile
		this.layerData[x][y] = null;
		// erase the corresponding area in the canvas
		if (this.preRender) {
			this.canvasRenderer.clearRect(
				x * this.tilewidth,
				y * this.tileheight,
				this.tilewidth,
				this.tileheight,
			);
		}
		this.isDirty = true;
	}
clear the tile at the specified position
@param {number} x - X coordinate (in map coordinates: row/column)
@param {number} y - Y coordinate (in map coordinates: row/column)
@example
me.game.world.getChildByType(me.TMXLayer).forEach(function(layer) {
    // clear all tiles at the given x,y coordinates
    layer.clearTile(x, y);
});