Multiple versions of Sencha Ext Core in the same page

It's possible to deploy multiple versions of Ext Core JS Library in the same web page?

jQuery uses the .noConflict() function for example.

Thanks, Wiliam.

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I wanna let users to insert our widgets into they pages, but I must use a specific version of Ext Core without overr开发者_运维问答iding the version that the user is using in his page.