code: def frequency_cutoff_from_name(name, m1, m2, s1z, s2z):
      
      params = {"mass1":m1, "mass2":m2, "spin1z":s1z, "spin2z":s2z}
      return named_frequency_cutoffs[name](params)
docs: Returns the result of evaluating the frequency cutoff function
      specified by 'name' on a template with given parameters.
  
      Parameters
      ----------
      name : string
          Name of the cutoff function
      m1 : float or numpy.array
          First component mass in solar masses
      m2 : float or numpy.array
          Second component mass in solar masses
      s1z : float or numpy.array
          First component dimensionless spin S_1/m_1^2 projected onto L
      s2z : float or numpy.array
          Second component dimensionless spin S_2/m_2^2 projected onto L
  
      Returns
      -------
      f : float or numpy.array
          Frequency in Hz