CDK upgrade: "expect(SynthUtils.toCloudFormation(stack)).toMatchSnapshot())"

[sphinx07]

Hi,

I am new to CDK and right now I need to upgrade the CDK version for my code but in the test, the old CDK has the SynthUtils as below

expect(SynthUtils.toCloudFormation(stack)).toMatchSnapshot()

I searched a couple of places but cannot find an equivalent for this command, only found SynthUtils.Synthesize(). Any suggestions?

Thanks!