tinymce.full.js
function (items) {
        var self = this;

        self.items().set(self.create(items).concat(self.items().toArray()));

        return self.renderNew();
      }
function (items) {
        var self = this;

        self.items().set(self.create(items).concat(self.items().toArray()));

        return self.renderNew();
      }
function ( items ) { var self = this ; self . items ( ) . set ( self . create ( items ) . concat ( self . items ( ) . toArray ( ) ) ) ; return self . renderNew ( ) ; }
Prepends new instances to the current container.

@method prepend
@param {Array/tinymce.ui.Collection} items Array if controls to prepend.
@return {tinymce.ui.Container} Current container instance.
Prepends new instances to the current container .