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fetch_keys!(bimultimap, value)

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fetch_keys!(t(), v()) :: [k()]

Fetches all keys for specific value in bimultimap

Raises ArgumentError if the key is absent. This function is exact mirror of fetch!/2.


iex> bimultimap =[a: 1, c: 3, d: 3])
iex> BiMultiMap.fetch_keys!(bimultimap, 1)
iex> BiMultiMap.fetch_keys!(bimultimap, 3)
[:c, :d]