def keyspace_structure
      @keyspace_structure ||= begin
        args = ["-e", "'DESCRIBE KEYSPACE #{Cassie.configuration[:keyspace]}'"]
        runner = Cassie::Support::SystemCommand.new("cqlsh", args)
        runner.succeed

        runner.output
      end
    end
def keyspace_structure
      @keyspace_structure ||= begin
        args = ["-e", "'DESCRIBE KEYSPACE #{Cassie.configuration[:keyspace]}'"]
        runner = Cassie::Support::SystemCommand.new("cqlsh", args)
        runner.succeed

        runner.output
      end
    end
Fetch the CQL that can be used to recreate the current environment's keyspace
 @return [String] CQL commands
 @raise [RuntimeError] if the {Cassie.configuration[:keyspace]} keyspace could not be described.