code: def get_default_config_help(self):
          
          config_help = super(PostgresqlCollector,
                              self).get_default_config_help()
          config_help.update({
              'host': 'Hostname',
              'dbname': 'DB to connect to in order to get list of DBs in PgSQL',
              'user': 'Username',
              'password': 'Password',
              'port': 'Port number',
              'password_provider': "Whether to auth with supplied password or"
              " .pgpass file  <password|pgpass>",
              'sslmode': 'Whether to use SSL - <disable|allow|require|...>',
              'underscore': 'Convert _ to .',
              'extended': 'Enable collection of extended database stats.',
              'metrics': 'List of enabled metrics to collect',
              'pg_version': "The version of postgres that you'll be monitoring"
              " eg. in format 9.2",
              'has_admin': 'Admin privileges are required to execute some'
              ' queries.',
          })
          return config_help
docs: Return help text for collector