return convertEmptyToNull(target);
    }

    public void setTarget(String value) {
        registerModifiedProperty("target");
        this.target = value;
    }

    public String getThumbnailId() {
        checkSpecifiedProperty("thumbnailId");
        return convertEmptyToNull(thumbnailId);
    }

    public void setThumbnailId(String value) {
        registerModifiedProperty("thumbnailId");