Using githubPush trigger for multibranchPipelineJob breaks seed job

[Ben Denney]

I'm trying to get a multibranchPipelineJob to trigger using the following groovy snippet (as shown in the job-dsl API):

'''

private void generateMultibranch(config) {

     multibranchPipelineJob ("${config.name}") {

           description ("Multibrach for ${config.name}") 

           triggers {

                 githubPush ()

           }

'''

If I try the above it breaks the seed job complaining about githubPush...what am I doing wrong? 

[Ben Denney]

I should add that I'm using Jenkins 2.300, job-dsl plugin 1.78.1, and GitHub plugin 1.34.1.

[Ben Denney]

And Pipeline: Multibranch plugin 2.26