I argue that users don't need two separate actions. They need a single action that will give them "more information"
about the focused method. The keyboard shortcut and CTRL+LMB would behave the same. The proposed behavior is as follows:

method invocation: navigate to source
method implementation: navigate to super implementation/interface if one exists

I argue that users don't expect two separate shortcuts for this action because they always want one or the other
behavior depending on the method type. Ultimately they would like more information regardless of the underlying type of
method. At least that's my theory :) What do you think?