code: public Integer delete(CMAEntry entry) {
      assertNotNull(entry.getSpaceId(), "spaceId");
      assertNotNull(entry.getEnvironmentId(), "environmentId");
      assertNotNull(entry.getId(), "entryId");
  
      return service.delete(
          entry.getSpaceId(),
          entry.getEnvironmentId(),
          entry.getId()
      ).blockingFirst().code();
    }
docs: Delete an Entry.
  
  @param entry Entry ID
  @return Integer representing the success (204) of the action
  @throws IllegalArgumentException if spaceId is null.
  @throws IllegalArgumentException if environmentId is null.
  @throws IllegalArgumentException if entryId is null.
  @throws IllegalArgumentException if entry is null.