{{alias}}( operation )
    Returns the operation side string associated with a supported BLAS operation
    side value.

    Parameters
    ----------
    operation: any
        Operation value.

    Returns
    -------
    out: string|null
        Operation string.

    Examples
    --------
    > var out = {{alias}}( 'left' )
    'left'
    > out = {{alias}}( {{alias:@stdlib/blas/base/operation-side-str2enum}}( 'left' ) )
    'left'

    See Also
    --------