How to use Jenkins P4 plugin publish for declarative pipeline - jenkins

Question

stage('Publish Assets')
{
when{
expression { //some condition }
}
steps{
p4publish(
credential: 'abcd',
publish: [$class: 'SubmitImpl', delete: false, description: 'Submitted by Jenkins. Build: ${BUILD_TAG}', onlyOnSuccess: true, purge: '', reopen: false],
workspace: [$class: 'ManualWorkspaceImpl', charset: 'none', name: 'jenkins-abcd-publish', pinHost: false, spec: [allwrite: true, backup: false, clobber: false, compress: false, line: 'LOCAL', locked: false, modtime: false, rmdir: false, serverID: '', streamName: '//abcd/efg', type: 'WRITABLE', view: '']])
}
}
I tried a couple of things and placing it under script block as well but no luck. Is it not suppose to work with declarative pipelines or am I missing something? It would be nice if I could get some help on this

Answer 1

Found this guide in the P4 plugin repo that might help. They seem to suggest using the snippet generator to help with getting the syntax correct. The examples they show are written with the imperative syntax, but I don't see why it wouldn't work for declarative.
node {
stage('Sync') {
// sync files from //streams/st1-main/...
p4sync(charset: 'none',
credential: 'phooey1666',
populate: [$class: 'AutoCleanImpl',
delete: true,
modtime: false,
pin: '',
quiet: true,
replace: true],
stream: '//streams/st1-main')
}
}
p4 publish https://github.com/jenkinsci/p4-plugin/blob/master/WORKFLOW.md#using-standard-freestyle-jobs-steps
p4publish(credential: 'phooey1666',
publish: [$class: 'SubmitImpl',
delete: false,
description: 'Submitted by Jenkins. Build: ${BUILD_TAG}',
onlyOnSuccess: false,
purge: '',
reopen: false],
workspace: [$class: 'StreamWorkspaceImpl',
charset: 'none',
format: 'jenkins-${NODE_NAME}-${JOB_NAME}-publish',
pinHost: false,
streamName: '//streams/st2-rel1'])
https://github.com/jenkinsci/p4-plugin/blob/master/WORKFLOW.md