Oxygen Diffusion# Base Model BaseModel Full Model Full Full.get_coupled_variables() Full.get_fundamental_variables() Full.set_boundary_conditions() Full.set_initial_conditions() Full.set_rhs() Leading Order Model LeadingOrder LeadingOrder.get_coupled_variables() LeadingOrder.get_fundamental_variables() LeadingOrder.set_initial_conditions() LeadingOrder.set_rhs() No Oxygen NoOxygen NoOxygen.get_fundamental_variables()