public void readFromParcel(Parcel in) {
        left = in.readFloat();
        top = in.readFloat();
        right = in.readFloat();
        bottom = in.readFloat();
    }
Set the viewport's coordinates from the data stored in the specified parcel. To write a viewport to a parcel,
call writeToParcel().

@param in The parcel to read the viewport's coordinates from
hellocharts-library/src/lecho/lib/hellocharts/model/Viewport.java