My Java project is build with Maven and written with the help of Intellij Idea. I have a lot of open-source project dependencies and I want to study them extensively to understand how they work. For this I often use a usage search in Idea, i.e. Find Usages option, which tells me where the usages of some class can be found. Also it can be Find In Path option, or some other code navigation tool.
The problem is that I am not sure all the sources are downloaded. Thats why my search may give wrong results.
A question is : how can I force Idea and Maven download all the sources for my project and make all my searches complete ?
In the 'Maven Projects' tab on the side of the Idea window is a toolbar button (looks like a box with a green arrow pointing down) for downloading sources and documentation.