Pattern: Explicit call to plus()
Issue: -
This rule detects when the plus(Object) method is called directly in code instead of using the + operator. A groovier way to express this: a.plus(b) is this: a + b. This rule can be configured to ignore this.plus(Object) using the ignoreThisReference property. It defaults to false, so even plus(x) will trigger a violation.
This rule also ignores all calls to super.plus(Object).