@Override
    protected final boolean equalsFunction(FunctionNode obj) {
        MultiArgFunctionNode rhs = (MultiArgFunctionNode)obj;
        if (!args.equals(rhs.args)) {
            return false;
        }
        return equalsMultiArgFunction(rhs);
    }
<p>Perform the appropriate calculation of the arguments into a result node.</p>

@param args   A list of operands.
@param result Place to put the result.
@return True if successful, false if not.
searchlib/src/main/java/com/yahoo/searchlib/expression/MultiArgFunctionNode.java