Constructor
new UrlBuilder()
    Applications must not call this constructor. It is an interface class and is not meant to be instantiated.
- Source:
Methods
urlForTile(tile, format) → {String}
    Creates the URL string for a resource.
    Parameters:
| Name | Type | Description | 
|---|---|---|
| tile | Tile | The tile for which to create the URL. | 
| format | String | The format to request. | 
- Source:
Throws:
- 
        If either the specified tile or format is null or undefined.
- Type
- ArgumentError
Returns:
    A string identifying the URL for the specified tile's resource.
- Type
- String