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Solve the following problem using Python, implementing the functions described below, one line at a time
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Description:
 def with_fixed_mpi_omp(self, mpi_procs, omp_threads):
 """ Disable autoparal and force execution with `mpi_procs` MPI processes and `omp_threads` OpenMP threads. Useful for generating benchmarks. """

        manager = self.manager if hasattr(self, "manager") else self.flow.manager
        self.manager = manager.new_with_fixed_mpi_omp(mpi_procs, omp_threads)