Typescript: make arguments optional

In interface.d.ts in these methods all the arguments are required:

onStart?: (file: RcFile) => void;
onError?: (error: Error, ret: object, file: RcFile) => void;
onSuccess?: (response: object, file: RcFile, xhr: object) => void;
onProgress?: (event: UploadProgressEvent, file: RcFile) => void;
beforeUpload?: (file: RcFile, FileList: RcFile[]) => BeforeUploadFileType | Promise<void | BeforeUploadFileType>;

But in my code I might be not interested in file argument, for example. While all args are required I must still define them and get TS errors for defined and not used variables.

Could you please make these args optional like this:

onSuccess?: (response?: object, file?: RcFile, xhr?: object) => void;

Open interface.d.ts and inspect the onStart, onError, onSuccess, onProgress, and beforeUpload callback declarations. Check the existing TypeScript definitions and usage expectations, then verify that callbacks may omit unused parameters without type errors and that the declarations remain valid.