How to use the spiceypy.utils.callbacks function in spiceypy

libspice.gfrr_c.argtypes   = [c_char_p, c_char_p, c_char_p, c_char_p, c_double, c_double, c_double, c_int,
                              s_cell_p, s_cell_p]
libspice.gfsep_c.argtypes  = [c_char_p, c_char_p, c_char_p, c_char_p, c_char_p, c_char_p, c_char_p, c_char_p, c_char_p,
                              c_double, c_double, c_double, c_int, s_cell_p, s_cell_p]
libspice.gfsntc_c.argtypes = [c_char_p, c_char_p, c_char_p, c_char_p, c_char_p, c_char_p, (c_double * 3), c_char_p,
                              c_char_p, c_char_p, c_double, c_double, c_double, c_int, s_cell_p,
                              s_cell_p]
libspice.gfsstp_c.argtypes = [c_double]
libspice.gfstep_c.argtypes = [c_double, c_double_p]
libspice.gfstol_c.argtypes = [c_double]
libspice.gfsubc_c.argtypes = [c_char_p, c_char_p, c_char_p, c_char_p, c_char_p, c_char_p, c_char_p, c_char_p, c_double,
                              c_double, c_double, c_int, s_cell_p, s_cell_p]
libspice.gftfov_c.argtypes = [c_char_p, c_char_p, c_char_p, c_char_p, c_char_p, c_char_p, c_double,
                              s_cell_p, s_cell_p]
libspice.gfudb_c.argtypes  = [callbacks.UDFUNS, callbacks.UDFUNB, c_double, s_cell_p, s_cell_p]
libspice.gfuds_c.argtypes  = [callbacks.UDFUNS, callbacks.UDFUNB, c_char_p, c_double, c_double, c_double, c_int, s_cell_p, s_cell_p]
libspice.gipool_c.argtypes = [c_char_p, c_int, c_int, c_int_p, c_int_p, c_int_p]
libspice.gnpool_c.argtypes = [c_char_p, c_int, c_int, c_int, c_int_p, c_void_p, c_int_p]

########################################################################################################################
# H

libspice.halfpi_c.restype = c_double
libspice.hrmint_c.argtypes = [c_int, c_double_p, c_double_p, c_double, c_double_p, c_double_p, c_double_p]
libspice.hx2dp_c.argtypes = [c_char_p, c_int, c_double_p, c_int_p, c_char_p]

########################################################################################################################
# I

libspice.ident_c.argtypes  = [(c_double * 3) * 3]
libspice.illum_c.argtypes  = [c_char_p, c_double, c_char_p, c_char_p, (c_double * 3), c_double_p,
                             c_double_p, c_double_p]

libspice.twovec_c.argtypes = [
    (c_double * 3),
    c_int,
    (c_double * 3),
    c_int,
    (c_double * 3) * 3,
]
libspice.txtopn_.argtypes = [c_char_p, c_int_p, c_int]
libspice.tyear_c.restype = c_double

########################################################################################################################
# U

libspice.ucase_c.argtypes = [c_char_p, c_int, c_char_p]
libspice.ucrss_c.argtypes = [(c_double * 3), (c_double * 3), (c_double * 3)]
libspice.uddc_c.argtypes = [callbacks.UDFUNS, c_double, c_double, c_int_p]
libspice.uddc_c.restype = None
libspice.uddf_c.argtypes = [callbacks.UDFUNS, c_double, c_double, c_double_p]
libspice.uddf_c.restype = None
libspice.udf_c.argtypes = [c_double, c_double_p]
libspice.udf_c.restype = None
libspice.union_c.argtypes = [s_cell_p, s_cell_p, s_cell_p]
libspice.unitim_c.argtypes = [c_double, c_char_p, c_char_p]
libspice.unitim_c.restype = c_double
libspice.unload_c.argtypes = [c_char_p]
libspice.unorm_c.argtypes = [(c_double * 3), (c_double * 3), c_double_p]
libspice.unormg_c.argtypes = [c_double_p, c_int, c_double_p, c_double_p]
libspice.utc2et_c.argtypes = [c_char_p, c_double_p]
########################################################################################################################
# V

libspice.vadd_c.argtypes = [(c_double * 3), (c_double * 3), (c_double * 3)]

# G

libspice.gcpool_c.argtypes = [c_char_p, c_int, c_int, c_int, c_int_p, c_void_p, c_int_p]
libspice.gdpool_c.argtypes = [c_char_p, c_int, c_int, c_int_p, c_double_p, c_int_p]
libspice.georec_c.argtypes = [c_double, c_double, c_double, c_double, c_double, (c_double * 3)]
libspice.getcml_c.argtypes = [c_int, c_char_p]
libspice.getelm_c.argtypes = [c_int, c_int, c_void_p, c_double_p, c_double_p]
libspice.getfat_c.argtypes = [c_char_p, c_int, c_int, c_char_p, c_char_p]
libspice.getfov_c.argtypes = [c_int, c_int, c_int, c_int, c_char_p, c_char_p, (c_double * 3), c_int_p,
                              POINTER(c_double * 3)]
libspice.getmsg_c.argtypes = [c_char_p, c_int, c_char_p]
libspice.gfbail_c.restype  = c_int
libspice.gfclrh_c.argtypes = None
libspice.gfdist_c.argtypes = [c_char_p, c_char_p, c_char_p, c_char_p, c_double, c_double, c_double, c_int,
                              s_cell_p, s_cell_p]
libspice.gfevnt_c.argtypes = [callbacks.UDSTEP, callbacks.UDREFN, c_char_p, c_int, c_int,
                              c_void_p, c_void_p, c_double_p, c_int_p, c_int_p, c_char_p,
                              c_double, c_double, c_double, c_int, callbacks.UDREPI, callbacks.UDREPU,
                              callbacks.UDREPF, c_int, c_int, callbacks.UDBAIL, s_cell_p, s_cell_p]

libspice.gffove_c.argtypes = [c_char_p, c_char_p, (c_double*3),
                              c_char_p, c_char_p, c_char_p, c_char_p, c_double,
                              callbacks.UDSTEP, callbacks.UDREFN, c_int, callbacks.UDREPI, callbacks.UDREPU,
                              callbacks.UDREPF, c_int, callbacks.UDBAIL, s_cell_p, s_cell_p]
libspice.gfinth_c.argtypes = [c_int]
libspice.gfilum_c.argtupes = [c_char_p, c_char_p, c_char_p, c_char_p, c_char_p, c_char_p,
                              c_char_p, (c_double * 3), c_char_p, c_double, c_double,
                              c_double, c_int, s_cell_p, s_cell_p]
libspice.gfocce_c.argtypes = [c_char_p, c_char_p, c_char_p, c_char_p, c_char_p,
                              c_char_p, c_char_p, c_char_p, c_char_p, c_double,
                              callbacks.UDSTEP, callbacks.UDREFN, c_int, callbacks.UDREPI, callbacks.UDREPU,
                              callbacks.UDREPF, c_int, callbacks.UDBAIL, s_cell_p, s_cell_p]

libspice.gfbail_c.restype = c_int
libspice.gfclrh_c.argtypes = None
libspice.gfdist_c.argtypes = [
    c_char_p,
    c_char_p,
    c_char_p,
    c_char_p,
    c_double,
    c_double,
    c_double,
    c_int,
    s_cell_p,
    s_cell_p,
]
libspice.gfevnt_c.argtypes = [
    callbacks.UDSTEP,
    callbacks.UDREFN,
    c_char_p,
    c_int,
    c_int,
    c_void_p,
    c_void_p,
    c_double_p,
    c_int_p,
    c_int_p,
    c_char_p,
    c_double,
    c_double,
    c_double,
    c_int,
    callbacks.UDREPI,
    callbacks.UDREPU,