human
Solve the following python programming problem given the following code:
def test_callProcessExitedMissing(self) : 
    '
        L{BaseProcess._callProcessExited} emits a L{DeprecationWarning} if the
        object referred to by its C{proto} attribute has no C{processExited}
        method.
        ' 
    class FakeProto () : 
        pass 
reason = object () 
    process = BaseProcess (FakeProto ()) 
    self.addCleanup (setWarningMethod, getWarningMethod ()) 
    warnings = [] 
    def collect(message, category, stacklevel) : 
        warnings.append ((message, category, stacklevel)) 
setWarningMethod (collect) 
    process._callProcessExited (process) 
    [(message, category, stacklevel)] = warnings 
    self.assertEqual (message, ('Since Twisted 8.2, IProcessProtocol.processExited is required.  %s.%s must implement it.' % (FakeProto.__module__, FakeProto.__name__))) 
    self.assertIdentical (category, DeprecationWarning) 
    self.assertEqual (stacklevel, 0) 

    
    

    Fix the buggy line: process._callProcessExited (process)
assistant
#Here is Python program to fix the buggy line: process.

process._callProcessExited (reason)