Bootstrapping is the process software uses to load itself, as in pulling yourself up by the bootstraps. For example, when you turn on your computer, it is booting up and loading the BIOS, the boot loader, and the operating system.
When you load a page, Drupal runs it's bootstrap process to get all the code needed into memory so it can execute the call.
How does the process start and how is your module code being loaded?
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