/**
* Creates a new instance based on a given {@link COSDictionary}.
*
* @param dict the dictionary
*/
public PDOptionalContentGroup(COSDictionary dict) {
if (!dict.getItem(COSName.TYPE).equals(COSName.OCG)) {
throw new IllegalArgumentException(
"Provided dictionary is not of type '" + COSName.OCG + "'");
}
this.ocg = dict;
}
