Parent functions Must Implement __init__ has_coercion_from (cpdef) gen ngens base_extend? For Advanced Users make_coercion_from (cpdef) make_conversion_from (cpdef) make_action_on (cpdef) make_action_by (cpdef) _populate_coercion_lists (cpdef) Advanced Calls get_coercion_from (cpdef) get_conversion_from (cpdef) get_action (cpdef)