{{!-- handlebars inline partials --}}
{{#*inline "countryCodesPartial"}}
    [
    {{#each this}}
        "{{this}}"{{#unless @last}},{{/unless}}
    {{/each}}
    ]
{{/inline}}

{{!-- create json file --}}
{
    "numberOfZones": {{numberOfZones}},
    "zones": [
        {{#each zones}}
            {
                "countryCodes": {{> countryCodesPartial countryCodes}},
                "timezone": "{{timezoneName}}"
            }{{#unless @last}},{{/unless}}
        {{/each}}
    ]
}