How to allow catchError in Jenkins?

So I fixed one of my organisation's needs by adding a catchError statement in one of their groovy files but in turn this creates a build error with a generic Jenkins test library BasePipelineTest:

[main] ERROR org.apache.maven.plugin.surefire.SurefirePlugin -   PipelineTest.testCall_AllFieldsAvailable:71 ? MissingMethod No signature
[main] ERROR org.apache.maven.plugin.surefire.SurefirePlugin -   PipelineTest.testCall_FieldsNotAvailable:130 ? MissingMethod No signature

As part of the Jenkins standard BasePipelineTest class the solution for this is typically:

helper.registerAllowedMethod("cleanWs", []) {}

For a method like cleanWs(), or something similar depending on the method and its inputs. However this is for methods with input values, but catchError doesn't have input values, rather it's done like:

catchError {
    ...
}

So helper.registerAllowedMethod("catchError", []) {} does not work. Does anyone know how to make it work for something like catchError?

I have also attempted:

 helper.registerAllowedMethod("catchError", [com.lesfurets.jenkins.unit.catchError]) {}

This creates a MissingProperty error

Turns out the curly brackets themselves register as a class in groovy. I fixed it with:

helper.registerAllowedMethod("catchError", [Closure.class]) {}