func (p GetFlattenedDocumentParams) WithPierce(pierce bool) *GetFlattenedDocumentParams {
	p.Pierce = pierce
	return &p
}
func (p GetFlattenedDocumentParams) WithPierce(pierce bool) *GetFlattenedDocumentParams {
	p.Pierce = pierce
	return &p
}
// WithPierce whether or not iframes and shadow roots should be traversed
// when returning the subtree (default is false).