def METHOD_NAME(self) -> List[str]:
    """Get the files changed on one git branch vs another.
    Returns:
        List[str]: File paths of changed files, relative to the git repo
            root.
    """
    optional_actual_commit_id = [] if self.actual_commit_id is None else [self.actual_commit_id]
    out = shell_tools.output_of(
        [
            'git',
            'diff',
            '--name-only',
            self.compare_commit_id,
            *optional_actual_commit_id,
            '--',
        ],
        cwd=self.destination_directory,
    )
    return [e for e in out.split('\n') if e.strip()]