Fixing type for operations.

4 jobs from master in 41 minutes and 27 seconds (queued for 37 minutes and 23 seconds)
Status Job ID Name Coverage
  Build
passed #8409
jars-j8

00:00:37

passed #8408
java8

00:14:23

 
  Test
passed #8411
allowed to fail
java11

00:12:47

passed #8410
java7

00:13:39