Is there a way to create a "speech bubble" symbol?

[sandrooco]

I'm trying to show some text inside of a speech bubble. Imagine a simplefill/polygon symbol combined with text in the center of it.

Is this possible without creating one text and one simplefill symbol?

[JoelBennett]

Version 4.26 introduced the ability to specify a background color and border for TextSymbols.  See also the release notes...although it speaks specifically of FeatureLayer labels, the changes apply to any use of TextSymbol.  I think that's the closest you're going to get with what the SDK natively provides.