+=head2 C<void sub_op_init(sub_op_config_t *c)>
+
+Initializes the fields of the C<sub_op_config_t> object.
+For future compatibility, it is required to call this function with your config object before storing your actual values.
+It will store safe defaults for members you won't set.
+
+=head2 C<void sub_op_register(pTHX_ const sub_op_config_t *c, U32 flags)>