A compound heterozygote is a pair of putatively deleterious variants on the same
gene.
A proband variant is assigned the category InCompoundHeterozygote if
both of the following are true:
The variant's functional annotations include at least one of the types in
compound_heterozygote_functional_types.
The variant is in the same gene as another such variant.
The variants can be either homozygous or heterozygous. The trio analysis later
determines whether a variant is putatively deleterious by examining the existing
functional annotations associated with the variant.
