merge method
Implementation
Options merge([Options? options]) => copyWith(
method: options?.method,
receiveTimeout: options?.receiveTimeout,
sendTimeout: options?.sendTimeout,
extra: options?.extra,
headers: options?.headers,
responseType: options?.responseType,
contentType: options?.contentType,
validateStatus: options?.validateStatus,
receiveDataWhenStatusError: options?.receiveDataWhenStatusError,
followRedirects: options?.followRedirects,
maxRedirects: options?.maxRedirects,
requestEncoder: options?.requestEncoder,
responseDecoder: options?.responseDecoder,
listFormat: options?.listFormat);