public boolean addUserData(Object userData) {
		if (this.userData == null) {
			this.userData = new ArrayList<>();
		}
		return this.userData.add(userData);
	}
public boolean addUserData ( Object userData ) { if ( this . userData == null ) { this . userData = new ArrayList < > ( ) ; } return this . userData . add ( userData ) ; }
Add a user data in the data associated to this point.

@param userData the user data to add.
@return <code>true</code> if the data was added; otherwise <code>false</code>.