Flutter: How to always show google map toolbar buttons without even selecting marker? - flutter

In flutter app i've created map with google_maps_flutter package, and placed a Marker, selecting marker shows two buttons at the bottom right of map, but i want those buttons to be shown always by defauld even without clicking on marker, (basically i only need navigation button of toolbar so that i can show routs between marker and current location of user), is this possible?

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