public void setNeighbourFinder(NeighbourFinder neighbourFinder) {
        this.neighbourFinder = neighbourFinder;
        resetCachedNeighbours();
    }
@param name the name of the scene element. This is required for
identification and comparison purposes.
@param patchSize size of the individual patches
@param totalSize the size of this entire terrain tree (on one side)
@param quadSize
@param scale
@param heightMap The height map to generate the terrain from (a flat
height map will be generated if this is null)
jme3-terrain/src/main/java/com/jme3/terrain/geomipmap/TerrainQuad.java