Since methods like insertMany accept both a List of elements and an InsertManyOptions which may allow for unordered insertion the API should allow for unordered collections to be passed in instead of the Always ordered java.util.List.

I'm attaching a PR where I propose for the methods that accept Lists of elements and InsertManyOptions to be changed from:

void insertMany(List<? extends TDocument> documents, InsertManyOptions options);

to:

void insertMany(Collection<? extends TDocument> documents, InsertManyOptions options);