flatten
Recursively unpacks all the given things into a flat list. Nulls are not removed, they are left intact.
Return
A flattened list of the given things
Parameters
things
The things to flatten
Recursively unpacks all the given things into a flat list, ensuring they are of a certain type. Nulls are not removed, they are left intact. If a non null object cannot be cast to the target type, a ClassCastException will be thrown.
Return
A flattened list of the given things
Parameters
things
The things to flatten
<T>
The target type in the flattened list