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Pierre-Yves David authored
The method allow code to check if an existing callback exists. It allow them to skip potentially expensive setup for a callback. Differential Revision: https://phab.mercurial-scm.org/D7832
8e09551206f5
The method allow code to check if an existing callback exists. It allow them to skip potentially expensive setup for a callback. Differential Revision: https://phab.mercurial-scm.org/D7832