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Solve the following problem using Python, implementing the functions described below, one line at a time
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Description:
 def check_concurrency(self) -> bool: """Checks the concurrency of the operation run. Checks the concurrency of the operation run to validate if we can start a new operation run. Returns: boolean: Whether to start a new operation run or not. """

        if not self.operation.concurrency:  # No concurrency set
            return True

        ops_count = self.operation.runs.filter(
            status__status__in=self.STATUSES.RUNNING_STATUS).count()
        return ops_count < self.operation.concurrency