for (String operatorSymbol : symbols) {
operators.push(operationFrom(operatorSymbol));
}
ExpressionStatement right = expressions.pop();
ExpressionStatement left = expressions.pop();
OperatorType operator = operators.pop();
BinaryOperation current = new BinaryOperation(operator, left, right);
if (operator == ELVIS_METHOD_CALL) {
MethodInvocation invocation = (MethodInvocation) right;
invocation.setNullSafeGuarded(true);
}