custom searcher for multiple custom field is not visible

[Dmitriy_Shalygin]

jira core (server) 7.12

I wrote seacher for multiple custom field, but it is not visible when i edit field config. 

Logs say this searcher is created. 

<customfield-searcher name="Multi Text Searcher" i18n-name-key="multidepsearcher.name" key="multidepsearcher"
                      class="nemavasi.jira.edo.company.cf.MultipleValuesSearcher">
    <description key="nmv-text-searcher.description">The Multi department Searcher Plugin</description>
    <valid-customfield-type package="nemavasi.jira.edo.company.cf" key="nemavasi-jira-custom-multi-department-chooser-cf"/>
    <resource name="search" type="velocity" location="/templates/cf/multichooser/text-searcher/search-basictext.vm"/>
    <resource name="view" type="velocity"   location="/templates/customfields/text-searcher/view-searcher-basictext.vm"/>
</customfield-searcher>

    <customfield-type name="Custom multi department chooser CF"
                      i18n-name-key="Department Multi Chooser"
                      key="nemavasi-jira-custom-multi-department-chooser-cf"
                      class="nemavasi.jira.edo.company.cf.MultiDepartmentChooserCF">
        <description key="Custom multi department chooser">
            Custom multi chooser for department
        </description>
        <resource name="view" type="velocity"
                  location="templates/cf/multichooser/department/view-readonly-chooser.vm"/>
        <resource name="column-view" type="velocity"
                  location="templates/cf/multichooser/department/view-readonly-chooser.vm"/>
        <resource name="xml" type="velocity"
                  location="templates/cf/multichooser/department/view-readonly-chooser.vm"/>
        <resource name="edit" type="velocity"
                  location="templates/cf/multichooser/department/edit-chooser.vm"/>
<!--        <valid-searcher-->
<!--                package="com.atlassian.jira.plugin.system.customfieldtypes"-->
<!--                key="textsearcher"/>-->
<!--        -->
    </customfield-type>

If i uncomment valid-searcher it (text seacher, not mine) is visible for selection when i edit field config.  

Why is my seacher invisible when i edit field config  ? 

[Dmitriy_Shalygin · Accepted solution]

Sorry, my mistake was a wrong value in  "

valid-customfield-type package

"

[Tu Ho]

Dear @Dmitriy_Shalygin ,

Currently, I want to develop a multi select customfield but i don't know how to create searcher for it. I took alot of time to research but can't resolve it. Could you share me the demo code for my case?

Thanks,

Tu