docs: def schema_exists(dbname, name, user=None,
                    db_user=None, db_password=None,
                    db_host=None, db_port=None):
      '''
      Checks if a schema exists on the Postgres server.
  
      CLI Example:
  
      .. code-block:: bash
  
          salt '*' postgres.schema_exists dbname schemaname
  
      dbname
          Database name we query on
  
      name
         Schema name we look for
  
      user
          The system user the operation should be performed on behalf of
  
      db_user
          database username if different from config or default
  
      db_password
          user password if any password for a specified user
  
      db_host
          Database host if different from config or default
  
      db_port
          Database port if different from config or default
  
      '''
      return bool(
          schema_get(dbname, name, user=user,
                     db_user=db_user,
                     db_host=db_host,
                     db_port=db_port,
                     db_password=db_password))