How to dynamically add web-items to agile board?

[Nataliya Zaytseva]

I have a section on agile board and want to dynamicaly add a web-items to it.

<web-section location="jira.agile.board.tools" key="custom-board-tool-section" weight="10">
        <label key="My Section"/>
</web-section>

I have tried to use a web-item-provider

<web-item-provider key="items-factory" name="Web Items Factory"
                       section="jira.agile.board.tools/custom-board-tool-section"
                       class="com.sample.impl.LinkFactory"
                       lazy="false"
                       weight="10"/>

with following code

package com.sample.impl;

import com.atlassian.plugin.servlet.PluginHttpRequestWrapper;
import com.atlassian.plugin.web.api.WebItem;
import com.atlassian.plugin.web.api.model.WebFragmentBuilder;
import com.atlassian.plugin.web.api.provider.WebItemProvider;
import com.sample.Utils;
import java.util.ArrayList;
import java.util.List;
import java.util.Map;

public class LinkFactory implements WebItemProvider {

    public Iterable<WebItem> getItems(Map<String, Object> map) {

        Map<String, String> names = Utils.getNames();
        final List<WebItem> links = new ArrayList<WebItem>();
        for (Map.Entry<String, String> entry : names.entrySet()) {
            String entryKey = entry.getKey();

            int weight = 10;
            links.add(new WebFragmentBuilder(weight += 10)

                    .id(entry.getValue())
                    .label(entryKey)
                    .title(entryKey)
                    .styleClass("")
                    .webItem("custom-board-tool-section")
//                    .webItem("")
                    .url(((PluginHttpRequestWrapper) map.get("request")).getContextPath() + "/secure/nnn")
                    .build());
        }
        return links;
    }

}

and this code does not add any web-item to my section.

Maybe somebody faced with similar problem and can help to solve it?

additional info : Jira version 7.1.1

Thanks in advance!