public boolean isNormal() {
      return (this == NORMAL || this == EVICTION_DISABLED || this == CRITICAL_DISABLED);
    }
Stores eviction and critical thresholds for memory as well as the logic for determining how
memory transitions between states.

@since Geode 1.0
geode-core/src/main/java/org/apache/geode/internal/cache/control/MemoryThresholds.java