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Solve the following problem using Python, implementing the functions described below, one line at a time
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Description:
 def map(cls, obj, mode='data', backend=None):
 """ Applies compositor operations to any HoloViews element or container using the map method. """

        from .overlay import CompositeOverlay
        element_compositors = [c for c in cls.definitions if len(c._pattern_spec) == 1]
        overlay_compositors = [c for c in cls.definitions if len(c._pattern_spec) > 1]
        if overlay_compositors:
            obj = obj.map(lambda obj: cls.collapse_element(obj, mode=mode, backend=backend),
                          [CompositeOverlay])
        element_patterns = [c.pattern for c in element_compositors]
        if element_compositors and obj.traverse(lambda x: x, element_patterns):
            obj = obj.map(lambda obj: cls.collapse_element(obj, mode=mode, backend=backend),
                          element_patterns)
        return obj