private void markOp(ClangToken tokenAtCursor) {
		ClangLine line = tokenAtCursor.getLineParent();
		for (ClangToken token : line.getAllTokens()) {
			if (token instanceof ClangVariableToken varToken) {
				if (varToken.isVariableRef()) {
					Varnode varnode = varToken.getVarnode();
					if (varnode != null && !varnode.isConstant()) {
						mark(varToken);
					}
				}
			}
		}
	}
Designate an item in the decompiler window as a sink. This can only be done if you are
on a HighSymbol
Ghidra/Features/DecompilerDependent/src/main/java/ghidra/app/plugin/core/decompiler/taint/actions/TaintSinkAction.java