Dowser.
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integer_range and long_range — the %{"gte" => _, "lte" => _} object
form <-> an Elixir Range (first..last//1).
Only what a Range holds exactly is cast: integer gte and lte bounds,
gte no greater than lte. Anything else is returned as it is stored — an
open-ended range (one bound only), exclusive gt/lt bounds, non-integer
bounds, and on the way out a Range whose step isn't 1.
iex> Dowser.Type.Range.load(%{"gte" => 1, "lte" => 10}, %{"type" => "integer_range"})
1..10
iex> Dowser.Type.Range.load(%{"gte" => 1}, %{"type" => "integer_range"})
%{"gte" => 1}
iex> Dowser.Type.Range.dump(1..10, %{"type" => "long_range"})
%{"gte" => 1, "lte" => 10}