Hello @Bhuvana
The analyzer assumes that two consecutive method calls do not necessarily return the same value.
It means that a null check on the first call to getBody() is not enough to avoid a NPE. You should extract the method call into a variable to not have an issue.
In a way, this is a limitation of the analyzer, it is not able to detect if a method always returns the same value or not, so it reports an issue anyway, taking the risk to report false positives. If you are confident your code is fine as it is, you can resolve the issue as false positive. As we improve our analyzer, we might eventually support such situations.
I like to see it in a more optimistic way: you should not consider that a method always returns the same value, even if you know it is the case, a future modification could break this contract. In addition, if the method hides computation, you could spare it by extracting it to a variable.
Hope it clarifies the situation.
Best,
Quentin