The method me() does not exist on Guillermoandrae\Repositories\RepositoryInterface. It seems like you code against a sub-type of Guillermoandrae\Repositories\RepositoryInterface such as Guillermoandrae\Highrise...itories\UsersRepository or Guillermoandrae\Highrise...itories\UsersRepository.
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Ignorable by Annotation
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If this is a false-positive, you can also ignore this issue in your code via the ignore-call annotation