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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 merge_pages(self, replacements):
 """ Deprecated method. """

         warnings.warn("merge_pages has been deprecated in favour of merge_templates",
                      category=DeprecationWarning,
                      stacklevel=2)         
         self.merge_templates(replacements, "page_break")