void uniform2fv(UniformLocation location, v)

Source 

void uniform2fv(UniformLocation location, v) {
  if ((v is Float32List) &&
      (location is UniformLocation || location == null)) {
    _blink.BlinkWebGL2RenderingContext.instance
        .uniform2fv_Callback_2_(this, location, v);
    return;
  }
  if ((v is List<num>) && (location is UniformLocation || location == null)) {
    _blink.BlinkWebGL2RenderingContext.instance
        .uniform2fv_Callback_2_(this, location, v);
    return;
  }
  throw new ArgumentError("Incorrect number or type of arguments");
}