- Parent functions
- Must Implement
init has_coercion_from (cpdef) gen ngens base_extend?
- make_coercion_from (cpdef) make_conversion_from (cpdef) make_action_on (cpdef) make_action_by (cpdef) _populate_coercion_lists (cpdef)
- get_coercion_from (cpdef) get_conversion_from (cpdef) get_action (cpdef)
- Must Implement