@Override
		public boolean hasNext() {
			synchronized (dbHandle) {
				try {
					return recordIter.hasNext();
				}
				catch (IOException e) {
					errHandler.dbError(e);
				}
				return false;
			}
		}
@see ghidra.util.datastruct.IndexRangeIterator#hasNext()
Ghidra/Framework/SoftwareModeling/src/main/java/ghidra/program/database/util/SharedRangeMapDB.java