The mutations of the sampled cell.
Details
This property contains a data frame that represents the sampled
cell mutations. The data frame format is analogous to that returned by
PhylogeneticForest$get_sampled_cell_mutations(): it has columns
cell_id, chr, (i.e., the mutation chromosome), chr_pos (i.e.,
position in the chromosome), allele (in which the mutation occurs),
ref, alt, type (i.e., either "SNV" or "indel"), cause, and
class (i.e., "driver", "passenger", "germinal" or
"preneoplastic").