private boolean findNext() {
		while (it.hasNext()) {
			Symbol s = it.next();
			if (s.getSymbolType() == type) {
				nextSymbol = s;
				return true;
			}
		}
		return false;
	}
@see ghidra.program.model.symbol.SymbolIterator#next()
Ghidra/Framework/SoftwareModeling/src/main/java/ghidra/program/database/symbol/TypeFilteredSymbolIterator.java