Exports the data from this tree to the given filename.
        
        :param      filename | <str>

def export(self, filename, exporter=None):
        """
        Exports the data from this tree to the given filename.
        
        :param      filename | <str>
        """
        filename = nativestring(filename)
        if exporter is None:
            ext = os.path.splitext(filename)[1]
            exporter = self.exporter(ext)
        
        if exporter:
            return exporter.exportTree(self, filename)
        else:
            return False