@Override
  public String toString() {
    return "HeapMemoryMonitor [thresholds=" + thresholds + ", mostRecentEvent="
        + mostRecentEvent + "]";
  }
Determines if the given member is in a heap critical state.

@param member Member to check.

@return True if the member's heap memory is in a critical state, false otherwise.
geode-core/src/main/java/org/apache/geode/internal/cache/control/HeapMemoryMonitor.java