/* original */
render(){
  const breadcrumbChain = this.createBreadcrumbs();
  return(
    <div>
      <Breadcrumbs title="Home" chain={breadcrumbChain}/>
      {(Meteor.user().permissions && Meteor.user().permissions.superAdmin)? (
        <div>
          <button onClick={()=>addTestData.call({site_id: this.props.match.params.site_id})}>Add Test Data</button>
          <button onClick={()=>removeTestData.call({})}>Remove Test Data</button>
        </div>
      ) : ''
      }

    </div>
  )
}

/* new code */
render(){
  const breadcrumbChain = this.createBreadcrumbs();
  const user = Meteor.user();
  const shouldShowButtons = user.permissions && user.permissions.superAdmin;
  return(
    <div>
      <Breadcrumbs title="Home" chain={breadcrumbChain}/>
      {
        shouldShowButtons && (
          <div>
            <button onClick={()=>addTestData.call({ site_id: this.props.match.params.site_id })}>Add Test Data</button>
            <button onClick={()=>removeTestData.call({})}>Remove Test Data</button>
          </div>
        )
      }
    </div>
  )
}