You're seeing just the function floatize_values, go back to Cldr.Map module for more information.
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floatize_values(map, options \\ [])

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Transforms a map's String.t values to Float.t values.


The map value is converted to a float from a String.t only when the value is comprised of a valid float form.

Values which cannot be converted to a float are returned unchanged.


iex> Cldr.Map.floatize_values %{a: %{b: "1.0"}}
%{a: %{b: 1.0}}

iex> Cldr.Map.floatize_values %{a: %{b: "1"}}
%{a: %{b: 1.0}}