Ember.Handlebars - how to get each item context?

I try to use custom handlebars helper:

/**
 * Bound Conditional if/else Block
 *
 * Executes the given block if all arguments are equal
 * NOTE: this helper is meant to be used by other helpers by specifying
 * a callback as the `conditional` option
 */
export default function() {
  var args = [].slice.call(arguments);
  var options = args.pop();
  var context = (options.contexts && options.contexts[0]) || this;

  // Find all unique values in the array; if one is left, they were all equal
  options.conditional = function(results) {
    return results.uniq().length === 1;
  };

  // Gather all bound property names to pass in order to observe them
  var properties = options.types.reduce(function(results, type, index) {
    if (type === 'ID') {
      results.push(args[index]);
    }
    return results;
  }, []);

  // Resolve actual values for all params to pass to the conditional callback
  var normalizer = function() {
    return Ember.Handlebars.resolveParams(context, args, options);
  };

  // This effectively makes the helper a bound helper
  // NOTE: 'content' path is used so that multiple properties can be bound to using the `childProperties` argument,
  // however this means that it can only be used with a controller that proxies values to the 'content' property
  return Ember.Handlebars.bind.call(context, 'content', options, true, options.conditional, normalizer, properties);
}

inside each loop

  {{#each field in formConfig.fields}}
      {{#ifCond field.type 'input-field'}}
        {{#input field.name  class="form-group"}}
          {{#input field.name class="form-group"}}
            {{label-field field.name text=field.label class="control-label col-sm-3"}}
            <div class="input-wrapper col-sm-9">
              {{input-field field.name class="form-control" placeholder=field.placeholder}}
            </div>
          {{/input}}
          {{field.type}}<br />
        {{/input}}
      {{/ifCond}}
  {{/each}}

Inside helper function I get params as string. But I can't find how get access for 'field' from helper function?

I try 'context', 'options.data.view' - neither allow get field data

If I pass item as param

{{#ifCond field 'type' 'input-field'}}

args contains array of strings

["field", "type", "input-field"]

The main question : how to get access for wrapper context inside helper function ( get item inside helper ) ?