class Prism::CaseNode

def end_keyword_loc

^^^
case true; when false; end

Represents the location of the `end` keyword. 
def end_keyword_loc
  location = @end_keyword_loc
  return location if location.is_a?(Location)
  @end_keyword_loc = Location.new(source, location >> 32, location & 0xFFFFFFFF)
end