
{{alias}}( dtype )
    Returns the single letter character abbreviation for a specified underlying
    array data type.

    If provided an unknown/unsupported data type, the function returns `null`.

    Parameters
    ----------
    dtype: string
        Data type.

    Returns
    -------
    ch: string|null
        Single letter character abbreviation.

    Examples
    --------
    > var ch = {{alias}}( 'float64' )
    'd'
    > ch = {{alias}}( 'foobar' )
    null

    See Also
    --------

