CustomDiffInSequence returns a CustomizeDiffFunc that runs all of the given CustomizeDiffFuncs in sequence, stopping at the first one that returns an error and returning that error.

CustomDiffWithAll returns a CustomizeDiffFunc that runs all of the given CustomizeDiffFuncs and returns all of the errors produced.

CustomizeDiffShim is a shim around the Terraform Plugin SDK which allows us to switch out the version of the Plugin SDK being used without breaking open PR's.

DefaultImporter is a wrapper around the default importer within the Plugin SDK at this point resources should be using ImporterValidatingResourceId, but this is providing a compatibility shim for the moment.

HashResource hashes complex structures that are described using a *Resource.

HashString hashes strings.

ImporterValidatingResourceId validates the ID provided at import time is valid using the validateFunc.

ImporterValidatingResourceIdThen validates the ID provided at import time is valid using the validateFunc then runs the 'thenFunc', allowing the import to be customised.

NewSet is a convenience method for creating a new set with the given items.

NonRetryableError is a helper to create a RetryError that's _not_ retryable from a given error.

Retry is a basic wrapper around StateChangeConf that will just retry a function until it no longer returns an error.

RetryableError is a helper to create a RetryError that's retryable from a given error.

StateUpgrades is a wrapper around the Plugin SDK's State Upgraders which allows us to upgrade the Plugin SDK without breaking all open PR's and attempts to make this interface a little less verbose.

ValueChangeConditionShim is a shim around the Terraform Plugin SDK which allows us to switch out the version of the Plugin SDK being used without breaking open PR's.

RetryError is the required return type of RetryFunc.

RetryFunc is the function retried until it succeeds.