How to use the @sourcegraph/codeintellify/lib/token_position.locateTarget function in @sourcegraph/codeintellify

.subscribe(event => {
                    // Prevent selecting text on shift click (click+drag to select will still work)
                    // Note that this is only called if the selection was empty initially (see above),
                    // so this only clears a selection caused by this click.
                    window.getSelection()!.removeAllRanges()

                    const position = locateTarget(event.target as HTMLElement, domFunctions)
                    let hash: string
                    if (
                        position &&
                        event.shiftKey &&
                        this.state.selectedPosition &&
                        this.state.selectedPosition.line !== undefined
                    ) {
                        hash = toPositionOrRangeHash({
                            range: {
                                start: {
                                    line: Math.min(this.state.selectedPosition.line, position.line),
                                },
                                end: {
                                    line: Math.max(this.state.selectedPosition.line, position.line),
                                },
                            },

.subscribe(event => {
                    // Prevent selecting text on shift click (click+drag to select will still work)
                    // Note that this is only called if the selection was empty initially (see above),
                    // so this only clears a selection caused by this click.
                    window.getSelection().removeAllRanges()

                    const position = locateTarget(event.target as HTMLElement, domFunctions)
                    let hash: string
                    if (
                        position &&
                        event.shiftKey &&
                        this.state.selectedPosition &&
                        this.state.selectedPosition.line !== undefined
                    ) {
                        hash = toPositionOrRangeHash({
                            range: {
                                start: {
                                    line: Math.min(this.state.selectedPosition.line, position.line),
                                },
                                end: {
                                    line: Math.max(this.state.selectedPosition.line, position.line),
                                },
                            },