code: function reportableIntervalURL(sourceIds) {
  		var url = (baseURL() +'/range/interval?nodeId=' +nodeId);
  		if ( Array.isArray(sourceIds) ) {
  			url += '&sourceIds=' + sourceIds.map(function(e) { return encodeURIComponent(e); }).join(',');
  		}
  		return url;
  	}
docs: Get a URL for the "reportable interval" for this node, optionally limited to a specific source ID.
  
  @param {Array} sourceIds An array of source IDs to limit query to. If not provided then all available
  sources will be returned.
  @returns {String} the URL to find the reportable interval
  @memberOf sn.api.node.nodeUrlHelper