Mutation list object
Examples
str(mutation_type)
#> List of 3
#> $ truncating: chr [1:6] "Nonsense_Mutation" "Frame_Shift_Ins" "Frame_Shift_Del" "Splice_Site" ...
#> $ missense : chr [1:2] "Missense_Mutation" "Splice_Site"
#> $ ignore : chr [1:16] "Silent" "lincRNA" "IGR" "3'UTR" ...