code: def contracts_source_path_with_stem(stem):
      
      return {
          'lib': _BASE.joinpath(stem, 'lib'),
          'raiden': _BASE.joinpath(stem, 'raiden'),
          'test': _BASE.joinpath(stem, 'test'),
          'services': _BASE.joinpath(stem, 'services'),
      }
docs: The directory remapping given to the Solidity compiler.