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lib/protocols/upper_caser_protocol.ex
defprotocol Digger.UpperCaser do
@moduledoc """
Documentation for Digger.UpperCaser Protocol
"""
@fallback_to_any true
@doc """
Upper case the first letter of a valid Types.data_type according to
the protocol implementation
"""
@spec upcase_first(Types.data_type(), keyword()) :: Types.valid_return_type()
def upcase_first(
data_type,
opts \\ [type: :key, key_transform: :upper, value_transform: :none]
)
end