1> case [1, 2, 3] of
1>   X when #{x => 1}#{x => 2} =:= #{x => 2} -> X
1> end.
[1,2,3]

iex> case [1, 2, 3] do
...>   x when %{%{x: 1} | x: 2} == %{x: 2} -> x
...> end

defguard is_same_struct?(left, right) when %{left | meta: nil} == %{right | meta: nil}

defguard equal_request?(left, right) when %{left | timestamp: nil} == %{right | timestamp: nil}