The plugin currently supports "scripted pipelines" thanks to the withAWSParameterStore pipeline method. It would be great if there was similar first-class support for "declarative pipelines".

An example of what this might look like:

pipeline {
    environment {
        EXAMPLE = awsparamstore(path: '/service', credentialsId: '', naming: 'relative', recursive: true, regionName: 'eu-west-1')
    }    

    stages {
        stage('stage') {
            steps {
                sh "echo look at me using $EXAMPLE_APP_PARAM from /service/app/param"
            }
        }
    }
}

Would you be happy to receive a pull request on GitHub adding this functionality? If so, I'd be happy to submit it. I would envision the arguments to the awsparamstore helper mirroring those of the scripted pipeline helper.

(Thanks for the helpful library!)