Fix return statement.
Fix return statement.

yanghongkjxy/prometheus,msiebuhr/prometheus,dsymonds/prometheus,prometheus/prometheus,keegancsmith/prometheus,datajet-io/prometheus,GoogleCloudPlatform/prometheus,GoogleCloudPlatform/prometheus,Conorbro/prometheus,tomwilkie/prometheus,PrFalken/prometheus,GoogleCloudPlatform/prometheus,tattsun/prometheus,JavierZunzunegui/prometheus,amorken/prometheus,brancz/prometheus,eliothedeman/prometheus,sudhi-vm/prometheus,sudhi-vm/prometheus,agaoglu/prometheus,tattsun/prometheus,tomwilkie/prometheus,tattsun/prometheus,dsymonds/prometheus,gottwald/prometheus,SaltedMan/prometheus-annotated,eliothedeman/prometheus,gottwald/prometheus,adamron1/prometheus,GoogleCloudPlatform/prometheus,Colstuwjx/prometheus,SaltedMan/prometheus-annotated,prometheus/prometheus,JavierZunzunegui/prometheus,alileza/prometheus,prometheus/prometheus,AlekSi/prometheus,Gouthamve/prometheus,Gouthamve/prometheus,sudhi-vm/prometheus,gottwald/prometheus,ton31337/prometheus,adamron1/prometheus,keegancsmith/prometheus,kzittritsch/prometheus,amorken/prometheus,Colstuwjx/prometheus,yanghongkjxy/prometheus,keegancsmith/prometheus,slok/prometheus,brancz/prometheus,kangwoo/prometheus,dmilstein/prometheus,alileza/prometheus,alileza/prometheus,eliothedeman/prometheus,ton31337/prometheus,eliothedeman/prometheus,AlekSi/prometheus,Colstuwjx/prometheus,agaoglu/prometheus,keegancsmith/prometheus,dsymonds/prometheus,Conorbro/prometheus,slok/prometheus,adamron1/prometheus,msiebuhr/prometheus,SaltedMan/prometheus-annotated,Conorbro/prometheus,ton31337/prometheus,brancz/prometheus,agaoglu/prometheus,msiebuhr/prometheus,kangwoo/prometheus,gottwald/prometheus,Stackdriver/stackdriver-prometheus,tomwilkie/prometheus,GoogleCloudPlatform/prometheus,yanghongkjxy/prometheus,yanghongkjxy/prometheus,Stackdriver/stackdriver-prometheus,tattsun/prometheus,dsymonds/prometheus,kzittritsch/prometheus,dmilstein/prometheus,AlekSi/prometheus,prometheus/prometheus,PrFalken/prometheus,kzittritsch/prometheus,AlekSi/prometheus,amorken/prometheus,PrFalken/prometheus,dmilstein/prometheus,datajet-io/prometheus,Gouthamve/prometheus,JavierZunzunegui/prometheus,PrFalken/prometheus,datajet-io/prometheus,alileza/prometheus,msiebuhr/prometheus,Stackdriver/stackdriver-prometheus,brancz/prometheus,Colstuwjx/prometheus,kangwoo/prometheus,slok/prometheus,Conorbro/prometheus,tomwilkie/prometheus,datajet-io/prometheus,slok/prometheus,dmilstein/prometheus,Gouthamve/prometheus,SaltedMan/prometheus-annotated,keegancsmith/prometheus,kangwoo/prometheus,sudhi-vm/prometheus,JavierZunzunegui/prometheus,ton31337/prometheus,Stackdriver/stackdriver-prometheus,amorken/prometheus,kzittritsch/prometheus,adamron1/prometheus,agaoglu/prometheus,alileza/prometheus,prometheus/prometheus