public ExprTree createVariadic(Location location, OpCode opc, VectorSTL<ExprTree> param) {
		entry("createVariadic", location, opc, param);
		VarnodeTpl outvn = buildTemporary(location);
		ExprTree res = new ExprTree(location);
		OpTpl op = new OpTpl(location, opc);
		res.ops = ExprTree.appendParams(op, param);
		res.ops.back().setOutput(outvn);
		res.outvn = new VarnodeTpl(location, outvn);
		return res;
	}
Handle a sleigh 'macro' invocation, returning the resulting p-code op templates (OpTpl)

@param location is the file/line where the macro is invoked
@param sym MacroSymbol is the macro symbol
@param param is the parsed list of operand expressions
@return a list of p-code op templates
Ghidra/Framework/SoftwareModeling/src/main/java/ghidra/pcodeCPort/slgh_compile/PcodeCompile.java