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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 set_main_vcl(self, service_id, version_number, name):
 		"""Set the specified VCL as the main."""

		content = self._fetch("/service/%s/version/%d/vcl/%s/main" % (service_id, version_number, name), method="PUT")
		return FastlyVCL(self, content)