declare const BackPressure: (_: void) => MergeStrategy

declare const BufferSliding: (_: void) => MergeStrategy

declare const match: {
  <A>(options: { readonly onBackPressure: () => A; readonly onBufferSliding: () => A }): (self: MergeStrategy) => A
  <A>(self: MergeStrategy, options: { readonly onBackPressure: () => A; readonly onBufferSliding: () => A }): A
}

export interface BackPressure extends MergeStrategy.Proto {
  readonly _tag: "BackPressure"
}

export interface BufferSliding extends MergeStrategy.Proto {
  readonly _tag: "BufferSliding"
}

type MergeStrategy = BackPressure | BufferSliding

declare const isBackPressure: (self: MergeStrategy) => self is BackPressure

declare const isBufferSliding: (self: MergeStrategy) => self is BufferSliding

declare const isMergeStrategy: (u: unknown) => u is MergeStrategy

declare const MergeStrategyTypeId: unique symbol

type MergeStrategyTypeId = typeof MergeStrategyTypeId

export interface Proto {
  readonly [MergeStrategyTypeId]: MergeStrategyTypeId
}