Function getDefaultSymbol

getDefaultSymbol(colorIndex, geometryType):
    | SimpleMarkerSymbol
    | SimpleLineSymbol
    | SimpleFillSymbol
    | MeshSymbol3D
    | undefined
Uses geometry type to determine symbol type and uses the index to alternate between colors of generated symbols.
Parameters
- colorIndex: number
  The index used to alternate symbol colors.
- geometryType: GeometryType
  The geometry type used to return the appropriate symbol.
Returns
    | SimpleMarkerSymbol
    | SimpleLineSymbol
    | SimpleFillSymbol
    | MeshSymbol3D
    | undefined