<SYSTEM_TASK:>
Solve the following problem using Python, implementing the functions described below, one line at a time
<END_TASK>
<USER_TASK:>
Description:
 def getAvailableClassesInModule(prooveModule):
 """ return a list of all classes in the given module that dont begin with '_' """

    l = tuple(x[1] for x in inspect.getmembers(prooveModule, inspect.isclass))
    l = [x for x in l if x.__name__[0] != "_"]
    return l