---
title: "MTFillExtrusionLayer.sourceLayer | Mobile sdk | Mobile sdk android | Android"
description: "sourceLayer"
---

# MTFillExtrusionLayer.sourceLayer

@SerialName(value = "source-layer")

open override var [sourceLayer](https://docs.maptiler.com/mobile-sdk/android/api/-map-tiler-s-d-k/com.maptiler.maptilersdk.map.style.layer.fillextrusion/-m-t-fill-extrusion-layer/source-layer/): [String](https://kotlinlang.org/api/core/kotlin-stdlib/kotlin/-string/index.html)?

Vector tile source layer name, if applicable. Required for vector tile sources.