A DESCRIPTION OF THE PROBLEM :
Add a new static method in the class java.lang.String that checks is null or empty.
This is a common check and is spread across many codebases.

An example of implementation cloud be something like:
```
public final class String {
    public static boolean isNullOrEmpty(String stringToCheck){
        return stringToCheck == null || stringToCheck.isBlank();
    }
}
```

One example of usage:
```
Stream.of("String one", null, "").filter(Predicate.not(String::isNullOrBlank)).toArray();
```