private
    
    public :: initialize_energy_bcs
    public :: bc_ss_flux
    public :: bc_ss_flux_turb
    public :: bdry_magnetic
    public :: bc_ss_flux_turb_x
    public :: bc_ss_flux_condturb_x
    public :: bc_ss_flux_condturb_mean_x
    public :: bc_ss_flux_condturb_z
    public :: bc_ss_temp_old
    public :: bc_lnrho_hds_z_iso_energ
    public :: bc_ss_temp_x
    public :: bc_ss_temp_y
    public :: bc_ss_temp_z
    public :: bc_lnrho_temp_z
    public :: bc_lnrho_pressure_z
    public :: bc_ss_temp2_z
    public :: bc_ss_temp3_z
    public :: bc_ss_stemp_x
    public :: bc_ss_stemp_y
    public :: bc_ss_stemp_z
    public :: bc_ss_a2stemp_x
    public :: bc_ss_a2stemp_y
    public :: bc_ss_a2stemp_z
    public :: bc_ss_energy
    public :: bc_ism_energ
    public :: bc_stellar_surface