def METHOD_NAME():
    '''Call the setenv procedure via a user defined procedure'''
    code = '''
    pro USER_SETENV, key, val
      SETENV, key + '=' + val
      print, GETENV(key)
    end
    '''
    s = 'blabla'
    with GDLFile(code) as name:
        GDL.pro(name, 'T1', s)