Method error

mypy/build.py:1558–1571

(
        self,
        line: int | None,
        msg: str,
        code: ErrorCode | None = None,
        *,
        blocker: bool = False,
        only_once: bool = False,
    )

        return False

    def error(
        self,
        line: int | None,
        msg: str,
        code: ErrorCode | None = None,
        *,
        blocker: bool = False,
        only_once: bool = False,
    ) -> None:
        if line is None:
            line = column = -1
        else:
            column = 0
        self.errors.report(line, column, msg, code, blocker=blocker, only_once=only_once)

    def note(
        self, line: int | None, msg: str, code: ErrorCode | None = None, *, only_once: bool = False