def METHOD_NAME(self):
    r"""
    Return all the hook lengths as a dictionary.
    EXAMPLES::
        sage: from sage.combinat.posets.d_complete import DCompletePoset
        sage: P = DCompletePoset(DiGraph({0: [1, 2], 1: [3], 2: [3], 3: []}))
        sage: P.get_hooks()
        {0: 1, 1: 2, 2: 2, 3: 3}
        sage: from sage.combinat.posets.poset_examples import Posets
        sage: YDP321 = Posets.YoungDiagramPoset(Partition([3,2,1]))                 # optional - sage.combinat
        sage: P = DCompletePoset(YDP321._hasse_diagram.reverse())                   # optional - sage.combinat
        sage: P.get_hooks()                                                         # optional - sage.combinat
        {0: 5, 1: 3, 2: 1, 3: 3, 4: 1, 5: 1}
    """
    return dict(self._hooks)