-void psi_let_callback_dump(int fd, struct psi_let_callback *cb, unsigned level);
-bool psi_let_callback_validate(struct psi_data *data, struct psi_let_exp *exp, struct psi_let_callback *cb, struct psi_impl *impl);
+void psi_let_callback_dump(struct psi_dump *dump, struct psi_let_callback *cb, unsigned level);
+bool psi_let_callback_validate(struct psi_data *data, struct psi_let_callback *cb, struct psi_validate_scope *scope);