Silk4J to recognize locators

I have an application that contains third-party locators that are not recognized by Silk4J libraries but are recognized by DevTools. 

The locator is for a dropdown box that does not have a fixed id but it is not unique. So I'm trying to use different ways to access the dropdown box. 

Locator: 

//gx-dropdown[2]//mat-select[@id='dd-nd-style']

Suggestions,

Steve

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