Function to resolve a schema in a requestBody object - modifies then
        response dict to convert Marshmallow Schema object or class into dict

def resolve_schema_in_request_body(self, request_body):
        """Function to resolve a schema in a requestBody object - modifies then
        response dict to convert Marshmallow Schema object or class into dict
        """
        content = request_body["content"]
        for content_type in content:
            schema = content[content_type]["schema"]
            content[content_type]["schema"] = self.openapi.resolve_schema_dict(schema)