hetero-radio is not visible, jenkins plugin

I was playing around with jenkins hello world plugin and was trying to customize it with hetero-radio instead of text, however my ui is not visible. I am new to jelly and jenkins. Can someone please help me out in this. I am trying to create somehthing like this highlighted in red

My program for this Demo1.java

    private final HeteroRadioEntry projectVersion;
    public HeteroRadioEntry getProjectVersion() { return projectVersion; }

    @Override
    public void perform(@Nonnull Run<?, ?> run, @Nonnull FilePath filePath, @Nonnull Launcher launcher, @Nonnull TaskListener taskListener) throws InterruptedException, IOException { }

    public static abstract class Entry extends AbstractDescribableImpl<Entry> {}

    public static final class SimpleEntry extends Entry {
        private final String text;
        @DataBoundConstructor public SimpleEntry(String text) { this.text = text; }
        public String getText() { return text; }
        @Extension public static class DescriptorImpl extends Descriptor<Entry> {
            @Override public String getDisplayName() { return "Simple Entry"; }
        }
    }

    public static final class AutoEntry extends Entry {
        private final String text;
        @DataBoundConstructor public AutoEntry() { this.text = "Some fixed string"; }
        public String getText() { return text; }
        @Extension public static class DescriptorImpl extends Descriptor<Entry> {
            @Override public String getDisplayName() { return "Auto Entry"; }
        }
    }

    public static final class HeteroRadioEntry extends Entry {
        private final Entry entry;
        @DataBoundConstructor public HeteroRadioEntry(Entry entry) { this.entry = entry; }
        public Entry getEntry() { return entry; }
        @Extension public static class DescriptorImpl extends Descriptor<Entry> {
            @Override public String getDisplayName() { return "Hetero-Radio"; }
            public List<Descriptor> getEntryDescriptors() {
                Jenkins jenkins = Jenkins.getInstance();
                return ImmutableList.of(jenkins.getDescriptor(AutoEntry.class), jenkins.getDescriptor(SimpleEntry.class));
            }
        }
    }

    @DataBoundConstructor public Demo1(HeteroRadioEntry projectVersion) { this.projectVersion=projectVersion; }

    @Symbol("greet")
    @Extension
    public static final class DescriptorImpl extends BuildStepDescriptor<Builder> {
        @Override public boolean isApplicable(Class<? extends AbstractProject> aClass) { return true; }
        @Override public String getDisplayName() { return "Demo1"; }
    }

}

Jelly program Demo1/config.jelly

<?jelly escape-by-default='true'?>
<j:jelly xmlns:j="jelly:core" xmlns:st="jelly:stapler" xmlns:d="jelly:define" xmlns:l="/lib/layout" xmlns:t="/lib/hudson" xmlns:f="/lib/form">
    <f:entry field="projectVersion"></f:entry>
</j:jelly> 

Demo1/HeteroListEntry/config.jelly

<j:jelly xmlns:j="jelly:core" xmlns:f="/lib/form">
    <f:entry title="Hetero-Choice">
        <f:hetero-radio field="entry" descriptors="${descriptor.entryDescriptors}" />
    </f:entry>
</j:jelly>

Demo1/AutoEntry/config.jelly

<j:jelly xmlns:j="jelly:core" xmlns:f="/lib/form">
    <f:label field="text" />
</j:jelly>

Demo1/SimpleEntry/config.jelly

<j:jelly xmlns:j="jelly:core" xmlns:f="/lib/form">
    <f:entry field="text">
        <f:textbox/>
    </f:entry>
</j:jelly>

With lots of efforts I was able to achieve the result, although not satisfactorily, by referring this link.It explains the functionality of hetero-radio/hetero-list. I move out the nested static classes outside