A class for storing Allele-Specific Chromatin (ASC) data together with the
underlying peak-level chromatin accessibility signal.
Inherits from DsAcc.
countsList of two matrices: 'ref' (reference-allele read counts) and
'alt' (alternative-allele read counts), each [SNP x sample].
accessibilityMatrix of peak-level ATAC-seq counts [peak x sample]. This is the
"total" chromatin accessibility signal, independent of allele.
May be a DelayedArray/HDF5Matrix when diskDump = TRUE.
diskDumpFlag indicating whether count data is stored on disk (HDF5) rather than in main memory.
The inherited coord slot is a list holding two GRanges:
coord$snps (heterozygous SNP positions, annotated with peakId) and
coord$peaks (consensus peak coordinates).