New collection utility methods
New collection utility methods

alecw/picard,broadinstitute/picard,annkupi/picard,broadinstitute/picard,broadinstitute/picard,alecw/picard,broadinstitute/picard,annkupi/picard,annkupi/picard,annkupi/picard,alecw/picard,alecw/picard,nh13/picard,nh13/picard,broadinstitute/picard,nh13/picard,nh13/picard