@Override
		public Symbol next() {
			if (hasNext()) {
				Symbol next = nextMatch;
				nextMatch = null;
				return next;
			}
			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