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interface RequestInitDiff {  /** if this is set, entries will be appended to url query parameters (previous parameters will be preserved). */  qs?: Record<string, string | undefined>;  /** if this is set, object entries will be used to create a form-urlencoded body. takes precedence over body */  form?: Record<string, string | string[]>;  /** if this is set, object entries will be used to create a FormData and used as body. takes precedence over body */  formData?: Record<string, string | string[]>;  /** if an object is passed, it will be sent as serialized json and header is set accordingly. */  body?: Record<string, unknown> | BodyInit | null;  /** a function that will be called before returning response.   *  can be used for validating response and throwing errors */  validator?:    ((response: Response, init: ExtendedRequestInit) => void | Promise<void>);  /** time in milliseconds which after the request should be cancelled and rejected */  timeout?: number;}
export type ExtendedRequestInit =  & RequestInitDiff  & Omit<RequestInit, keyof RequestInitDiff>;