old_contents: from galpy.orbit_src import Orbit
  
  #
  # Classes
  #
  Orbit= Orbit.Orbit
  
new_contents: from galpy.orbit_src import Orbit
  
  #
  # Functions
  #
  # Boundary conditions
  zEqZeroBC= Orbit._zEqZeroBC
  vzEqZeroBC= Orbit._vzEqZeroBC
  REqZeroBC= Orbit._REqZeroBC
  vREqZeroBC= Orbit._vREqZeroBC
  vTEqZeroBC= Orbit._vTEqZeroBC
  phiEqZeroBC= Orbit._phiEqZeroBC
  
  #
  # Classes
  #
  Orbit= Orbit.Orbit
  
  
subject: put the default boundary conditions at the top level