I don't have a StackReference class in my latest pull of

@pulumi/pulumi

. Is it in a different package?

index.ts(19,27): error TS2339: Property 'StackReference' does not exist on type 'typeof import("/home/tsi/eshamay/git/mustang/sdp-mustang-terraform/pulumi/eks-cluster/node_modules/@pulumi/pulumi/index")'.