def check_outgoing_exec(this, err: list[str], labels: list[str]) -> bool: ...
def check_incoming_exec(this, err: list[str], labels: list[str]) -> bool: ...
def check_outgoing_data(this, err: list[str], labels: list[str]) -> bool: ...
def check_incoming_data(this, err: list[str], labels: list[str]) -> bool: ...
def check_is_type(s: str, typ: any) -> bool: ...
def check_code_syntax(code) -> bool: ...