/** Currently defined types */
type RequestErrorResult = {
  errors: Error[] // request errors only
  extensions?: object
}
type ExecutionResult = {
  data: {} | null
  errors?: Error[] // execution errors only
  extensions?: object
}
type ResponseStream = ExecutionResult[]

/** New types that are yielded by an Incremental Stream */
interface InitialExecutionResult extends ExecutionResult {
  incremental: IncrementalResult[]
  pending?: Pending[]
  completed?: CompletedResult[],
  hasNext?: boolean;
}

type SubsequentExecutionResult = {
  incremental?: IncrementalResult[]
  pending?: Pending[]
  completed?: CompletedResult[],
  hasNext?: boolean;
}

type IncrementalStream = [InitialExecutionResult, ...SubsequentExecutionResult[]];

/** Response is updated to include IncrementalStream as a new member */
type Response = RequestErrorResult | ExecutionResult | ResponseStream | IncrementalStream;

type IncrementalResult = IncrementalObjectResult | IncrementalListResult