le the target list is supposed to represent a large number of genes from the target
species. The default output will be the largest possible list. If returnAllPossible = TRUE then
all possible pairings with any matches are returned. It is possible to limit the
search by setting possibleOrigins and possibleTargets. Note that gene symbols of some species
are more similar to each other than others. Using this with small gene lists and without providing any
possibleOrigins or possibleTargets might return multip