title: "Find Usages" in 3rd party libraries
body: <p>I'm using Intellij with Maven, so it's very easy to download the source code of any 3rd party library I'm using (assuming it posted the source to the Maven repository, of course). Is it possible to find usages of a method within that 3rd party library?</p>
  
  <p>In other words, I would like to use IntelliJ's "Find Usages" action and find usages that aren't in my code, but in the 3rd party source code. Is it possible? If not in IntelliJ, is there another tool that does this?</p>