code: function centerize(parent_el, child_el, options) {
          Embedo.log('info', 'centerize', parent_el, child_el, options);
          if (!Embedo.utils.validateElement(parent_el) || !Embedo.utils.validateElement(child_el)) {
            return;
          }
          options = options || {};
  
          if (options.width) {
            parent_el.style.width = options.width;
            parent_el.style.maxWidth = options.width;
            parent_el.style.marginLeft = 'auto';
            parent_el.style.marginRight = 'auto';
          }
  
          if (options.height) {
            parent_el.style.height = options.height;
            parent_el.style.maxHeight = options.height;
          }
  
          child_el.style.display = '-moz-box';
          child_el.style.display = '-ms-flexbox';
          child_el.style.display = '-webkit-flex';
          child_el.style.display = '-webkit-box';
          child_el.style.display = 'flex';
          child_el.style.textAlign = 'center';
          child_el.style['justify-content'] = 'center';
          child_el.style['align-items'] = 'center';
          child_el.style.margin = '0 auto';
        }
docs: @function centerize
  Align an element center in relation to parent div
  
  @param {HTMLElement} parent_el
  @param {HTMLElement} child_el
  @param {object} options
  @returns