/**
 * Given two sets of genes, return a set of genes that are common to both sets.
 */
fun findCommonGenes(geneSet1: Set<String>, geneSet2: Set<String>): Set<String> {

    val commonGenes = geneSet1.intersect(geneSet2)
    return commonGenes
}
/**
 * Given two sets of genes, return a set of genes that are common to both sets.
 */
fun findCommonGenes(geneSet1: Set<String>, geneSet2: Set<String>): Set<String> {
/**
 * Given two sets of genes, return a set of genes that are common to both sets.
 */
fun findCommonGenes(geneSet1: Set<String>, geneSet2: Set<String>): Set<String> {

    val commonGenes = geneSet1.intersect(geneSet2)
    return commonGenes
}