text: from options import option_namespaces, option_subjects
  from options.cache import FREQUENT_CACHE_TTL
  from options.option import NAMESPACE_DB_OPTION_MARKER, Option, OptionStores
  from options.types import CONF_TYPES
  
  ENV_VARS_BUILD_JOBS = '{}{}{}'.format(option_namespaces.ENV_VARS,
                                        NAMESPACE_DB_OPTION_MARKER,
                                        option_subjects.BUILD_JOBS)
  ENV_VARS_JOBS = '{}{}{}'.format(option_namespaces.ENV_VARS,
                                  NAMESPACE_DB_OPTION_MARKER,
                                  option_subjects.JOBS)
  ENV_VARS_EXPERIMENTS = '{}{}{}'.format(option_namespaces.ENV_VARS,
                                         NAMESPACE_DB_OPTION_MARKER,
                                         option_subjects.EXPERIMENTS)
  ENV_VARS_NOTEBOOKS = '{}{}{}'.format(option_namespaces.ENV_VARS,
                                       NAMESPACE_DB_OPTION_MARKER,
                                       option_subjects.NOTEBOOKS)
  ENV_VARS_TENSORBOARDS = '{}{}{}'.format(option_namespaces.ENV_VARS,
                                          NAMESPACE_DB_OPTION_MARKER,
                                          option_subjects.TENSORBOARDS)
  
  
  class EnvVarsOption(Option):
      is_global = False
      is_secret = False
      is_optional = True
      is_list = True
      typing = CONF_TYPES.LIST
      store = OptionStores.DB_OPTION
      default = None
      options = None
      cache_ttl = FREQUENT_CACHE_TTL
  
  
  class EnvVarsBuildJobs(EnvVarsOption):
      key = ENV_VARS_BUILD_JOBS
      description = 'Env vars configuration for build jobs'
  
  
  class EnvVarsJobs(EnvVarsOption):
      key = ENV_VARS_JOBS
      description = 'Env vars configuration for jobs'
  
  
  class EnvVarsExperiments(EnvVarsOption):
      key = ENV_VARS_EXPERIMENTS
      description = 'Env vars configuration for experiments'
  
  
  class EnvVarsNotebooks(EnvVarsOption):
      key = ENV_VARS_NOTEBOOKS
      description = 'Env vars configuration for notebooks'
  
  
  class EnvVarsTensorboards(EnvVarsOption):
      key = ENV_VARS_TENSORBOARDS
      description = 'Env vars configuration for tensorboards'
  