hasParent

True if child M1 in A has a parent P.

  1. eponymoustemplate hasParent(alias A, alias P)
  2. alias hasParent(alias A, string M, alias P) = hasParent!(getChild!(A, M), P)
    alias hasParent(alias A, string M, alias P) = hasParent!(getChild!(A, M), P)

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