Table constructor.
let my-table = table("red"=>"stop", "green"=>"go");
let my-table = table(<string-table>, "red"=>"stop", "green"=>"go");table( (table-class), (key) => (element), ... )
| table-class | A subclass of <explicit-key-collection>. Optional. Defaults to <table>. |
| key | An instance of <object>. The key for element. |
| element | An instance of <object>. |
| table | An instance of table-class containing keys and elements. |