def is_dense(ns_key):
if ns_key not in __NAMESPACE__:<EOL><INDENT>raise NamespaceError('<STR_LIT>'.format(ns_key))<EOL><DEDENT>return __NAMESPACE__[ns_key]['<STR_LIT>']<EOL>
Determine whether a namespace has dense formatting.

    Parameters
    ----------
    ns_key : str
        Namespace key identifier

    Returns
    -------
    dense : bool
        True if `ns_key` has a dense packing
        False otherwise.