code: function ($placeholder) {
  			$.fn.mediumInsert.insert.deselect();
  
  
  			var formHtml = '<div class="medium-editor-toolbar medium-editor-toolbar-active medium-editor-toolbar-form-anchor mediumInsert-embedsWire" style="display: block;"><input type="text" value="" placeholder="' + this.options.urlPlaceholder + '" class="mediumInsert-embedsText medium-editor-toolbar-anchor-input"></div>';
  			$(formHtml).appendTo($placeholder.prev());
  			setTimeout(function () {
  				$placeholder.prev().find('input').focus();
  			}, 50);
  
  			$.fn.mediumInsert.insert.deselect();
  
  			this.currentPlaceholder = $placeholder;
  			$(".mediumInsert-embedsText").focus();
  		}
docs: Add embed to $placeholder
  @param {element} $placeholder $placeholder to add embed to
  @return {void}