We can also rule out some attribute types as indicating something other
than the legacy SDK.
- Tuple types were not generated at all.
- There were no single objects types, the convention was to use a block
list or set of length 1.
- Maps of objects were not possible to generate, since named blocks were
not implemented.
- Nested collections were not supported, but when they were generated they
would have primitive types.
If structural types are being used, we can be assured that the legacy
SDK SchemaConfigModeAttr is not being used, and the fixup is not needed.
This prevents inadvertent mapping of blocks to structural attributes,
and allows us to skip the fixup overhead when possible.
This is part of a general effort to move all of Terraform's non-library
package surface under internal in order to reinforce that these are for
internal use within Terraform only.
If you were previously importing packages under this prefix into an
external codebase, you could pin to an earlier release tag as an interim
solution until you've make a plan to achieve the same functionality some
other way.
