Process.alive-question-mark
You're seeing just the function
alive-question-mark, go back to Process module for more information.
Specs
Tells whether the given process is alive on the local node.
If the process identified by pid is alive (that is, it's not exiting and has
not exited yet) than this function returns true. Otherwise, it returns
false.
pid must refer to a process running on the local node or ArgumentError is raised.
Inlined by the compiler.