Remove shadow from ion-searchbar (material design)

I’m having trouble finding the CSS Shadom DOM variables in Ionic4 that can help me remove the [actual] shadow from the ion-searchbar component in md mode. Have gone through joshmorony’s articles and videos and haven’t found a solution, yet. Any suggestions?

I didn’t tried, just a question, are you sure the shadow comes from the searchbar?

Just had a look to the source of the component and I didn’t found any box-shadow