// getSubstanceAt.js
(function () {
  /*global adventurejs A*/
  "use strict";
  var p = adventurejs.Tangible.prototype;
  /**
   * Get the substance, if any, contained in this asset.
   * @memberOf adventurejs.Tangible
   * @method adventurejs.Tangible#getSubstanceAt
   * @returns {String}
   */
  p.getSubstanceAt = function Tangible_getSubstanceAt(aspect) {
    if (
      this.hasAspectAt(aspect) &&
      this.aspects[aspect].vessel.getVolume() > 0
    ) {
      return this.aspects[aspect].vessel.substance_id;
    }
    return "";
  }; // getSubstanceAt.js
})();