Retrieve the REF and ALT strings for the specified VariantKey. Return REF+ALT length or 0 if the VariantKey is not found.

FindRefAltByVariantKey(vk, mc = vk.env$nrvk_$MC)

Arguments

vk

VariantKey to search.

mc

Memory-mapped columns object as retured by MmapNRVKfile.