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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 built(self):
 """Called just after this File node is successfully built. Just like for 'release_target_info' we try to release some more target node attributes in order to minimize the overall memory consumption. @see: release_target_info """


        SCons.Node.Node.built(self)

        if (not SCons.Node.interactive and
            not hasattr(self.attributes, 'keep_targetinfo')):
            # Ensure that the build infos get computed and cached...
            SCons.Node.store_info_map[self.store_info](self)
            # ... then release some more variables.
            self._specific_sources = False
            self._labspath = None
            self._save_str()
            self.cwd = None

            self.scanner_paths = None