Besides ImmutableErrorDetails, there seem to be some classes that cannot be imported, such as ：

[goyalrajat]

          Besides ImmutableErrorDetails, there seem to be some classes that cannot be imported, such as ：

com.amazonaws.appflow.custom.connector.model.metadata.ImmutableDescribeEntityResponse
com.amazonaws.appflow.custom.connector.model.metadata.ImmutableListEntitiesResponse

Originally posted by @Yassin-fan in #59 (comment)