{{alias}}( dtype )
    Returns the C data type associated with a provided data type value.

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

    Parameters
    ----------
    dtype: any
        Data type value.

    Returns
    -------
    out: string|null
        C data type.

    Examples
    --------
    > var out = {{alias}}( 'float64' )
    'double'
    > out = {{alias}}( 'foobar' )
    null

    See Also
    --------