@classmethod
def decode_pdf(cls, simula_pdf_file_dict):
    """
        The reverse of :meth:`encode_pdf`.
        """
    return {'filename': simula_pdf_file_dict['filename'], 'data': cls.
        decode_pdfdata(simula_pdf_file_dict['base64data']), 'content_type':
        simula_pdf_file_dict['content_type']}
