void *psi_let_stmt_exec(struct psi_let_stmt *stmt, struct psi_call_frame *frame);
bool psi_let_stmts_validate(struct psi_data *data, struct psi_validate_scope *scope);
void *psi_let_stmt_exec(struct psi_let_stmt *stmt, struct psi_call_frame *frame);
bool psi_let_stmts_validate(struct psi_data *data, struct psi_validate_scope *scope);