public boolean isEmpty() {
		return values().iterator().hasNext();
	}
Check if this index is empty

<p>
Except for sub-ranged indexes, this is equivalent to checking if the object store is empty.
For sub-ranged indexes, this checks if the store contains any object whose value for the
indexed field falls within the restricted range.

@return true if empty
Ghidra/Debug/ProposedUtils/src/main/java/ghidra/util/database/DBCachedObjectIndex.java