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ImportValue

The Fn::ImportValue function in CloudFormation imports a value that has been previously exported from another stacks outputs section

Info on Fn::ImportValue from AWS can be found here

In KloudFormation you can use the ImportValue class.

If another stack exports a VPC Id like this:

outputs(
    "StackVPC" to Output(
            value = vpc.ref(),
            description = "The ID of the VPC",
            export = Output.Export(awsStackName + "-VPCID")
    )
)

Then this can be imported as follows:

ImportValue(otherStackName.ref() + "-VPCID")