Popover with multiple yield blocks

pop-over.hbs

{{yield
  (
    hash
      trigger=(
        component 'pop-over-trigger'
        onClick=(action 'toggleDialog')
      )
  )
}}

{{#if showDialog}}
  {{yield
    (
      hash
        dialog=(
          component 'pop-over-dialog'
        )
    )
  }}
{{/if}}