How to specify vector dimension when using phi silica to generate embedding

I found this [api](https://learn.microsoft.com/en-us/windows/windows-app-sdk/api/winrt/microsoft.windows.ai.text.languagemodel.generateembeddingvectors?view=windows-app-sdk-1.8) that seems could be used for embedding generation. But I didn't see any parameter to control the dimension. Can this be configured?