BeamFile.which

You're seeing just the function which, go back to BeamFile module for more information.

Specs

which(module()) ::
  {:ok, String.t()} | {:error, :non_existing | :preloaded | :cover_compiled}

Returns the absolute filename for the module.

If the module cannot be found, {:error, :non_existing} is returned.

If the module is preloaded, {:error, :preloaded} is returned.

If the module is Cover-compiled, {:error, :cover_compiled} is returned.