def METHOD_NAME(self, filename, filename_info, filetype_info):
    """Mimic reader input file content."""
    file_content = {
        '/attr/PlatformShortName': 'GCOM-W1',
        '/attr/SensorShortName': 'AMSR2',
        '/attr/StartOrbitNumber': '22210',
        '/attr/StopOrbitNumber': '22210',
    }
    k = 'Geophysical Data'
    file_content[k] = DEFAULT_FILE_DATA[:, :]
    file_content[k + '/shape'] = (DEFAULT_FILE_SHAPE[0], DEFAULT_FILE_SHAPE[1])
    file_content[k + '/attr/UNIT'] = 'K'
    file_content[k + '/attr/SCALE FACTOR'] = 1
    k = 'Latitude of Observation Point'
    file_content[k] = DEFAULT_FILE_DATA[:, :]
    file_content[k + '/shape'] = (DEFAULT_FILE_SHAPE[0], DEFAULT_FILE_SHAPE[1])
    file_content[k + '/attr/UNIT'] = 'deg'
    file_content[k + '/attr/SCALE FACTOR'] = 1
    k = 'Longitude of Observation Point'
    file_content[k] = DEFAULT_FILE_DATA[:, :]
    file_content[k + '/shape'] = (DEFAULT_FILE_SHAPE[0], DEFAULT_FILE_SHAPE[1])
    file_content[k + '/attr/UNIT'] = 'deg'
    file_content[k + '/attr/SCALE FACTOR'] = 1
    convert_file_content_to_data_array(file_content, dims=('dim_0', 'dim_1'))
    return file_content