Local variables are not shown for methods

[mcserep]

While testing #646, I found that local variables are not shown for methods in the Info Tree. It is only working properly for functions, as I have experienced. It is unrelated to the tested PR and the bug is present before it, so I open this issue.

Correct functionality with functions:

Incorrect functionality with methods (note, that the count of the local variables are displayed, but upon expanding it, none is shown):

I have verified, that the executed Thrift query returns an empty result, thus:

• either this is a parsing issue (but the number of local variables are shown);
• the Thrift call is made incorrectly;
• it is a frontend issue (in that case, it applies for both the old and the new frontend).