class Prism::MultiWriteNode

def lparen_loc

^
(a, b, c) = 1, 2, 3

The location of the opening parenthesis. 
def lparen_loc
  location = @lparen_loc
  case location
  when nil
    nil
  when Location
    location
  else
    @lparen_loc = Location.new(source, location >> 32, location & 0xFFFFFFFF)
  end
end