MeshDepthMaterial constructor
      
      MeshDepthMaterial([ 
    
- Map<
MaterialProperty, dynamic> ? parameters 
parameters - (optional) an object with one or more
properties defining the material's appearance. Any property of the
material (including any property inherited from Material) can be
passed in here.
Implementation
MeshDepthMaterial([Map<MaterialProperty, dynamic>?parameters]) : super() {
  _init();
  setValues(parameters);
}