def METHOD_NAME(prev_atoms, atoms):
  prevCA, prevC, thisN, thisCA = get_omega_atoms(prev_atoms, atoms)
  if (not None in [ prevCA, prevC, thisN, thisCA]):
    omega = omega_from_atoms(prevCA, prevC, thisN, thisCA)
    if(omega > -30 and omega < 30):
      return True
  return False