Typed Inttegro request parameters.
@type t() :: %Inttegro.FileReferenceInput{ field: String.t(), file_id: String.t(), purpose: String.t() | nil, reference: String.t() | nil, reference_kind: String.t() | nil }
@spec from_map(map()) :: t()
@spec new!(map() | keyword()) :: t()
@spec to_map(t()) :: map()