public void setTopOffset(Double topOffset) {
        this.topOffset = topOffset;
    }
See the description in leftOffset. For topOffset, specify the position of the top edge of the rectangle, as a
percentage of the underlying frame height, and relative to the top edge of the frame. For example, \"10\" means
the measurement is 10% of the underlying frame height. The rectangle top edge starts at that position from the top
edge of the frame. This field corresponds to tts:origin - Y in the TTML standard.

@param topOffset
       See the description in leftOffset. For topOffset, specify the position of the top edge of the rectangle,
       as a percentage of the underlying frame height, and relative to the top edge of the frame. For example,
       \"10\" means the measurement is 10% of the underlying frame height. The rectangle top edge starts at that
       position from the top edge of the frame. This field corresponds to tts:origin - Y in the TTML standard.
aws-java-sdk-medialive/src/main/java/com/amazonaws/services/medialive/model/CaptionRectangle.java