Finds the smallest value, returning the node at which it was found, or undefined.
Values are compared using the collection’s intrinsic contentEquals and
contentCompare, determined at time of construction.
This is fast (logarithmic) and performs no rotations of the splay tree backing
the SortedSet.
Returns the smallest value in this collection.
Finds the largest value, returning the node at which it was found, or undefined.
Finds the smallest value greater than the given value, returning the node at which it was found, or undefined.
Finds the smallest value greater than or equal to the given value, returning the node at which it was found, or undefined.
Finds the first equivalent value.