def validate_file_path(file_path: str) -> None:
    """
    Validates if a file exists at the given file path.

    Args:
        file_path (str): The path to the file.

    Raises:
        FileNotFoundError: If the file does not exist at the given file path.

    """
    if not os.path.exists(file_path):
        raise FileNotFoundError(f"File not found: {file_path}")

    Validates if a file exists at the given file path.

    Args:
        file_path (str): The path to the file.

    Raises:
        FileNotFoundError: If the file does not exist at the given file path.

    
llama-index-integrations/readers/llama-index-readers-upstage/llama_index/readers/upstage/document_parse.py