... 642Section A.17. Visitor 643Section A.18. The Visitor drops by 644 Head First Design Patterns Head First Design Patterns Head First Design Patterns By Eric Freeman, Bert Bates, Kathy Sierra, Elisabeth ... \PQ[JWWS<PMWZQOQVIT/W.IOZMML\WPI^M\PMQZXPW\W[QV\PQ[JWWSAM[\PMaZMITTaIZM\PI\OWWLTWWSQVO1;*6"!C5E Head First Design Patterns Page 1 Return to Table of Contents Head First Design Patterns Head First Design Patterns By Eric Freeman, Bert Bates, Kathy ... LM^MTWXMZ[\PZW]OPW]\\PM_WZTL*]\[MZQW][Ta_PMVIZM_MOWQVO\W[MMI[MKWVLMLQ\QWV')N\MZITTQ\¼[JMMVWVTa\MVaMIZ[ Head First Design Patterns Page 2 Return to Table of Contents Head First Design Patterns Head First Design Patterns By Eric Freeman, Bert Bates, Kathy...