PipelineOwner({VoidCallback onNeedVisualUpdate, VoidCallback onSemanticsOwnerCreated, VoidCallback onSemanticsOwnerDisposed })

Creates a pipeline owner.

Typically created by the binding (e.g., RendererBinding), but can be created separately from the binding to drive off-screen render objects through the rendering pipeline.

Source 

PipelineOwner({
  this.onNeedVisualUpdate,
  this.onSemanticsOwnerCreated,
  this.onSemanticsOwnerDisposed,
});