Strategy based on the directed adjacency method described in [umi_tools](http://dx.doi.org/10.1101/051755) that allows for errors between UMIs but only when there is a count gradient.
Strategy to cluster reads into groups based on mismatches between reads in clusters.
Strategy to only reads with identical UMI sequences are grouped together.
Strategy similar to the Adjacency strategy similar to adjacency but for methods that produce template with a pair of UMIs such that a read with A-B is related to but not identical to a read with B-A.
The string constructor method that enables us to create the case object instance by name.
The string constructor method that enables us to create the case object instance by name.