aeron-cluster/src/main/java/io/aeron/cluster/ClusterControl.java
public static AtomicCounter findControlToggle(final CountersReader counters)
    {
        final AtomicBuffer buffer = counters.metaDataBuffer();

        for (int i = 0, size = counters.maxCounterId(); i < size; i++)
        {
            final int recordOffset = CountersReader.metaDataOffset(i);

            if (counters.getCounterState(i) == RECORD_ALLOCATED &&
                buffer.getInt(recordOffset + TYPE_ID_OFFSET) == CONTROL_TOGGLE_TYPE_ID)
            {
                return new AtomicCounter(counters.valuesBuffer(), i, null);
            }
        }

        return null;
    }
public static AtomicCounter findControlToggle(final CountersReader counters)
    {
        final AtomicBuffer buffer = counters.metaDataBuffer();

        for (int i = 0, size = counters.maxCounterId(); i < size; i++)
        {
            final int recordOffset = CountersReader.metaDataOffset(i);

            if (counters.getCounterState(i) == RECORD_ALLOCATED &&
                buffer.getInt(recordOffset + TYPE_ID_OFFSET) == CONTROL_TOGGLE_TYPE_ID)
            {
                return new AtomicCounter(counters.valuesBuffer(), i, null);
            }
        }

        return null;
    }
Find the control toggle counter or return null if not found.

@param counters to search for the control toggle.
@return the control toggle counter or return null if not found.