Augment a CNAqc object with Single Base Substitution (SBS) data for mutational signature deconvolution.
This creates set of objects that are stored inside field `SBS` of the input object. These are:
* `SNVs`, a tibble for SNVs used for SBS data preparation; * `GRanges`, a GRanges object for the above tibble; * `counts`, a trinucleotide count matrix for SBS deconvolution.
In particular, `counts` is the canonnical format to run SBS deconvolution in a variety of tools.
SBS(x)
A CNAqc object with required SBS data in the inner field `SBS`.