Grouping and decorating groups of parameters in Jenkins

So, after much searching the web I finally found a plugin that does the trick. The Parameter Separator Plugin. The wiki page doesn't say how to make it work in a pipeline, but after some trial and error this is how I got it to work. I hope this is useful to others.

String sectionHeaderStyle = '''
    color: white;
    background: green;
    font-family: Roboto, sans-serif !important;
    padding: 5px;
    text-align: center;
'''

String separatorStyle = '''
    border: 0;
    border-bottom: 1px dashed #ccc;
    background: #999;
'''

properties([
    parameters([
        [
            $class: 'ParameterSeparatorDefinition',
            name: 'FOO_HEADER',
            sectionHeader: 'Foo Parameters',
            separatorStyle: separatorStyle,
            sectionHeaderStyle: sectionHeaderStyle
        ],
        string(
            name: 'FOO 1'
        ),
        string(
            name: 'FOO 2'
        ),
        string(
            name: 'FOO 3'
        ),
        [
            $class: 'ParameterSeparatorDefinition',
            name: 'BAR_HEADER',
            sectionHeader: 'Bar Parameters',
            separatorStyle: separatorStyle,
            sectionHeaderStyle: sectionHeaderStyle
        ],
        string(
            name: 'BAR 1'
        ),
        string(
            name: 'BAR 2'
        ),
        string(
            name: 'BAR 3'
        )
    ])
])

This is the result:

Edit:

I tested this with Jenkins 2.61, Pipeline Plugin 2.5 and the Parameter Separator Plugin 1.0

for dsl you can specify:

String sectionHeaderStyleCss = ' color: white; background: green; font-family: Roboto, sans-serif !important; padding: 5px; text-align: center; '

String separatorStyleCss = ' border: 0; border-bottom: 1px dashed #ccc; background: #999; '

pipelineJob("Foo-job") {
    description("FOO with separators")

    parameters {
        parameterSeparatorDefinition {
            name('FOO_1')
            separatorStyle(separatorStyleCss)
            sectionHeader('FOO_1')
            sectionHeaderStyle(sectionHeaderStyleCss)
        }

Don't make the silly mistake of using the name sectionHeaderStyle as per example in your dsl as that will conflict with the constructor!

which you will obviously spot when you see the error: No signature of method: java.lang.String.call() is applicable for argument types: (java.lang.String) values: []