class reference dictionary

gistfile1.m

NSString * const MYFoo = @"foo";
NSString * const MYBar = @"bar";

@implementation Baz

+ (NSDictionary *)metaSyntacticTypes {
  static NSDictionary *_metaSyntacticTypes = nil;
  if (_metaSyntacticTypes == nil) {
    _metaSyntacticTypes = [NSDictionary dictionaryWithObjectsAndKeys:
                           @"foo", MYFoo,
                           @"bar", MYBar,
                           nil];
  }
  return _metaSyntacticTypes;
}