class YARP::HashPatternNode

def copy(**params)
  HashPatternNode.new(
    params.fetch(:constant) { constant },
    params.fetch(:assocs) { assocs },
    params.fetch(:kwrest) { kwrest },
    params.fetch(:opening_loc) { opening_loc },
    params.fetch(:closing_loc) { closing_loc },
    params.fetch(:location) { location },
  )
end