Problem Passing Vars to Handlebar Helpers

// Handlebar Helper -- helpers/if-type-is.js

import Ember from "ember";

export default function(type, assType) {
  return assType === type;
}

// Handlebar Template --- templates/assignments/reflections.hbs

{{#each assignment in model}}
  {{#if-type-is 'reflection' assignment.type}}
    <div>
    <p>{{assignment.name}} is a reflection</p>
    </div>
  {{/if-type-is}}
{{/each}}


// The helper keeps getting passed two strings: "reflection" and "assignment.type" instead of the actual property value for assignment.type, and thus the condition is never satisfied and nothing is rendered.

// What is the proper syntax for passing my helper the object's property value?

// Thanks.