When generating the typescript-fetch client from the deidentifier schema, one of the models apparently has a name conflict with some internal type in TypeScript, leading to the following error (repeated several times when generating from schema):
[main] WARN o.o.c.l.AbstractTypeScriptClientCodegen - Error (model name matches existing language type) cannot be used as a model name. Renamed to ModelError
This leads to creation of a file and class called ModelError.ts.