Element implicitly has an 'any' type because expression of type '"x-internal"' can't be used to index type 'OpenAPIV3.SchemaObject | OpenAPIV3_1.SchemaObject | OpenAPIV2.SchemaObject'.
Property 'x-internal' does not exist on type 'OpenAPIV3.SchemaObject | OpenAPIV3_1.SchemaObject | OpenAPIV2.SchemaObject'.