createContainer() {
    const $container = $(
      `<div id="flowchart_${u.uniqueID}" style="margin:auto;position:relative,width:100%;height:100%"></div>`
    );
    this.$elem.html($container);
    return $container[0];
  }
/**
   *Create a div container for graph
   *
   * @returns {DOM}
   * @memberof FlowchartHandler
   */
Create a div container for graph
@returns {DOM}
@memberof FlowchartHandler
Create a div container for graph @returns { DOM } @memberof FlowchartHandler
createContainer() {
    const $container = $(
      `<div id="flowchart_${u.uniqueID}" style="margin:auto;position:relative,width:100%;height:100%"></div>`
    );
    this.$elem.html($container);
    return $container[0];
  }
createContainer ( ) { const $container = $ ( ` ${ u . uniqueID } ` ) ; this . $elem . html ( $container ) ; return $container [ 0 ] ; }
Create a div container for graph
 @returns {DOM}
 @memberof FlowchartHandler
Create a div container for graph @returns { DOM } @memberof FlowchartHandler