private void addSymbolAttribute(AttributedVertex vertex, CodeBlock bb) {
		SymbolIterator it = program.getSymbolTable().getSymbolsAsIterator(bb.getMinAddress());
		int count = 0;
		if (it.hasNext()) {
			StringBuffer buf = new StringBuffer();
			for (Symbol symbol : it) {
				if (count != 0) {
					buf.append('\n');
				}
				// limit the number of symbols to include (there can be a ridiculous # of symbols)
				if (count++ > MAX_SYMBOLS) {
					buf.append("...");
					break;
				}
				buf.append(symbol.getName());
			}
			vertex.setAttribute(SYMBOLS_ATTRIBUTE, buf.toString());
		}

	}
Set the maximum number of code lines which will be used per block when
showCode is enabled.
@param maxLines maximum number of code lines
Ghidra/Features/ProgramGraph/src/main/java/ghidra/graph/program/BlockGraphTask.java