{{#if hasBlock}}
  {{#g-map-marker mapContext lat=lat lng=lng icon=icon group=group title=title as |markerContext|}}
    {{yield markerContext}}
  {{/g-map-marker}}
{{else}}
  {{g-map-marker mapContext lat=lat lng=lng icon=icon title=title group=group}}
{{/if}}

{{#if hasBlock}}
  {{#g-map-marker mapContext lat=lat lng=lng icon=icon label=label group=group title=title as |markerContext|}}
    {{yield markerContext}}
  {{/g-map-marker}}
{{else}}
  {{g-map-marker mapContext lat=lat lng=lng icon=icon label=label title=title group=group}}
{{/if}}

Add label support to address-marker
Add label support to address-marker
