VisiblePosition pos = ... // some position if (pos.isNotNull()) { // do something } else { // handle the case where pos is null or undefined }
VisiblePosition pos = ... // some position if (!pos.isNotNull()) { // handle the case where pos is null or undefined return; } // pos is not null or undefined, so we can access it safely // access the position and do something elseIn this example, we use the negation operator to check if pos is null or undefined. If it is null or undefined, we handle the case and return. Otherwise, we can safely access the position and do something else. Overall, the VisiblePosition isNotNull method is commonly used in WebKit to ensure that there is a valid position to be accessed.