def METHOD_NAME(self, context):
    self.inputs.new('SvStringsSocket', "Start").prop_name = 'start_'
    self.inputs.new('SvStringsSocket', "Step").prop_name = 'stop_'
    self.inputs.new('SvStringsSocket', "Stop").prop_name = 'step_'
    self.outputs.new('SvStringsSocket', "Range")