How to use the catcher.utils.file_utils.get_filename function in catcher

def _compile_java(file, variables, libraries=None):
    resource_dir = variables['RESOURCES_DIR']
    classpath = _form_classpath(libraries)
    return_code, stdout, stderr = run_cmd('javac {} -d . *.java'.format(classpath),
                                          variables,
                                          cwd=resource_dir,
                                          shell=True)  # compile everything
    if return_code != 0:
        raise Exception("Can't compile {}. Out: {}, Err: {}".format(file, stdout, stderr))
    class_file = file_utils.find_resource(resource_dir, file_utils.get_filename(file), '.class')
    if len(class_file) > 1:
        debug('Found more than 1 resource for {}: {}. Use last.'.format(file_utils.get_filename(file), class_file))
        class_file = class_file[-1]
    else:
        class_file = class_file[0]
    module = file_utils.cut_part_path(resource_dir, class_file).replace('/', '.')
    return module.split('.class')[0]

def _compile_java(file, variables, libraries=None):
    resource_dir = variables['RESOURCES_DIR']
    classpath = _form_classpath(libraries)
    return_code, stdout, stderr = run_cmd('javac {} -d . *.java'.format(classpath),
                                          variables,
                                          cwd=resource_dir,
                                          shell=True)  # compile everything
    if return_code != 0:
        raise Exception("Can't compile {}. Out: {}, Err: {}".format(file, stdout, stderr))
    class_file = file_utils.find_resource(resource_dir, file_utils.get_filename(file), '.class')
    if len(class_file) > 1:
        debug('Found more than 1 resource for {}: {}. Use last.'.format(file_utils.get_filename(file), class_file))
        class_file = class_file[-1]
    else:
        class_file = class_file[0]
    module = file_utils.cut_part_path(resource_dir, class_file).replace('/', '.')
    return module.split('.class')[0]

def __prepare_file(file: dict, variables: dict):
        resources = variables['RESOURCES_DIR']
        [file_key] = [k for k in file.keys() if k != 'type']
        filepath = file[file_key]
        file_type = file.get('type', 'text/plain')
        filename = file_utils.get_filename(filepath)
        file = fill_template_str(file_utils.read_file(os.path.join(resources, filepath)), variables)
        return file_key, (filename, file, file_type)

def _compile_kotlin(file, variables, libraries=None):
    resource_dir = variables['RESOURCES_DIR']
    filename = file_utils.get_filename(file)
    return_code, stdout, stderr = run_cmd('kotlinc {}.kt -include-runtime -d {}.jar'.format(filename, filename),
                                          variables,
                                          cwd=resource_dir,
                                          shell=True)  # compile everything
    if return_code != 0:
        raise Exception("Can't compile {}. Out: {}, Err: {}".format(file, stdout, stderr))
    return filename + '.jar'