default boolean isKnown(long snap, AddressRange range) {
		Collection<Entry<TraceAddressSnapRange, TraceMemoryState>> states = getStates(snap, range);
		if (states.isEmpty()) {
			return false;
		}
		if (states.size() != 1) {
			return false;
		}
		AddressRange entryRange = states.iterator().next().getKey().getRange();
		if (!entryRange.contains(range.getMinAddress()) ||
			!entryRange.contains(range.getMaxAddress())) {
			return false;
		}
		return true;
	}
Check if a range addresses are all known

@param snap the time
@param range the range to examine
@return true if the entire range is {@link TraceMemoryState#KNOWN}
Ghidra/Debug/Framework-TraceModeling/src/main/java/ghidra/trace/model/memory/TraceMemoryOperations.java