def METHOD_NAME(self, src_base: Path = Path.cwd(), dest_base: Path = Path.cwd()):
    """Resolve all paths and check they are relative to src_base and dest_base
    Args:
        src_base: Base directory for all src items.
        dest_base: Base directory for dest.
    """
    self.src = [
        check_subpath(src_base / path, src_base, path.endswith(os.sep))
        for path in self.src
    ]
    self.dest = check_subpath(
        dest_base / self.dest, dest_base, self.dest.endswith(os.sep)
    )