@Override
		public LabelHistory next() {
			try {
				DBRecord rec = iter.next();
				if (rec != null) {
					return new LabelHistory(
						addrMap.decodeAddress(
							rec.getLongValue(LabelHistoryAdapter.HISTORY_ADDR_COL)),
						rec.getString(LabelHistoryAdapter.HISTORY_USER_COL),
						rec.getByteValue(LabelHistoryAdapter.HISTORY_ACTION_COL),
						rec.getString(LabelHistoryAdapter.HISTORY_LABEL_COL),
						new Date(rec.getLongValue(LabelHistoryAdapter.HISTORY_DATE_COL)));
				}
			}
			catch (IOException e) {
				program.dbError(e);
			}
			return null;

		}
Called by the NamespaceManager when a namespace is removed; remove all symbols that have the
given namespace ID.

@param namespaceID ID of namespace being removed
Ghidra/Framework/SoftwareModeling/src/main/java/ghidra/program/database/symbol/SymbolManager.java