ParseCSV = function (name, data, tileWidth, tileHeight, insertNull)
{
    var array2D = data
        .trim()
        .split('\n')
        .map(function (row) { return row.split(','); });

    var map = Parse2DArray(name, array2D, tileWidth, tileHeight, insertNull);
    map.format = Formats.CSV;

    return map;
}
Parses a CSV string of tile indexes into a new MapData object with a single layer.

@function Phaser.Tilemaps.Parsers.ParseCSV
@since 3.0.0

@param {string} name - The name of the tilemap, used to set the name on the MapData.
@param {string} data - CSV string of tile indexes.
@param {number} tileWidth - The width of a tile in pixels.
@param {number} tileHeight - The height of a tile in pixels.
@param {boolean} insertNull - Controls how empty tiles, tiles with an index of -1, in the map
data are handled. If `true`, empty locations will get a value of `null`. If `false`, empty
location will get a Tile object with an index of -1. If you've a large sparsely populated map and
the tile data doesn't need to change then setting this value to `true` will help with memory
consumption. However if your map is small or you need to update the tiles dynamically, then leave
the default value set.

@return {Phaser.Tilemaps.MapData} The resulting MapData object.