def check_concurrency(self) -> bool:
if not self.pipeline.concurrency:  <EOL><INDENT>return True<EOL><DEDENT>return self.n_operation_runs_to_start > <NUM_LIT:0><EOL>
Check the pipeline concurrency.

        Checks the concurrency of the pipeline run
        to validate if we can start a new operation run.

        Returns:
            boolean: Whether to start a new operation run or not.