void vertexAttrib3fv(int indx, values)

Source 

void vertexAttrib3fv(int indx, values) {
  if ((values is Float32List) && (indx is int)) {
    _blink.BlinkWebGL2RenderingContext.instance
        .vertexAttrib3fv_Callback_2_(this, indx, values);
    return;
  }
  if ((values is List<num>) && (indx is int)) {
    _blink.BlinkWebGL2RenderingContext.instance
        .vertexAttrib3fv_Callback_2_(this, indx, values);
    return;
  }
  throw new ArgumentError("Incorrect number or type of arguments");
}