estack_ax(stack, top)->u.ptr.type = LOAD_ROOT_PAYLOAD;
estack_ax(stack, top)->u.ptr.ptr = filter_stack_data;
/* "field" only needed for variants. */
estack_ax(stack, top)->u.ptr.field = NULL;
estack_ax(stack, top)->u.ptr.type = LOAD_ROOT_PAYLOAD;
estack_ax(stack, top)->u.ptr.ptr = filter_stack_data;
/* "field" only needed for variants. */
estack_ax(stack, top)->u.ptr.field = NULL;