How to use the scratch-blocks.OUTPUT_SHAPE_ROUND function in scratch-blocks

name: 'PROPERTY',
                    options: function () {
                        return menuOptionsFn();
                    }

                },
                {
                    type: 'input_value',
                    name: 'OBJECT'
                }
            ],
            output: true,
            colour: ScratchBlocks.Colours.sensing.primary,
            colourSecondary: ScratchBlocks.Colours.sensing.secondary,
            colourTertiary: ScratchBlocks.Colours.sensing.tertiary,
            outputShape: ScratchBlocks.OUTPUT_SHAPE_ROUND
        };
    };