I’m using aws-cdk-lib==2.80.0

When I try to create a state machine via CDK, I keep running into the same error:

‘aws_cdk.aws_stepfunctions’ has no attribute ‘DefinitionBody’

Or FileDefinitionBody. Or whatever. None of what I try seems to work.

from aws_cdk import NestedStack, aws_stepfunctions as sfn, aws_iam as iam

...

        ingestion_state_machine = sfn.StateMachine(
            self, f"ingestionStateMachine",
            definition_body=sfn.DefinitionBody.from_file(os.path.join(statemachine_path, "ingestion.asl.json")),
            definition_substitutions={
                "gdriveListArn": lambdas['gdriveList'].function_arn,
                "gdriveConvertArn": lambdas['gdriveConvert'].function_arn
            },
        )

But from the docs, it seems that we should have

definition_body (Optional[DefinitionBody]) – Definition for this state machine.

And the DefinitionBody has

classmethodfrom_file(path…)

Where am I going wrong?