There is useful feature that can be borrowed from IntelliJ editor: You can opt
to have the editor mark the code scope of the current caret position. 

e.x. 

. If the caret is inside a class about outside of any instance method, the
entire class is marked by a blue bar on the left.

. If the caret is inside a "if" or "try" block, the blue bar spans the entire
"if" or "try" block.

. If the caret is inside a method but outside of any {} blocks, the blue bar
spans the entire method.

.....

This would be very useful when you have to work with code that has real long
if/else or try/catch blocks, and methods. Espcially when the code is written by
others, and you are trying to figure out what's going on.