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Text File  |  1987-06-17  |  256b  |  12 lines
  1. Class UndefinedObject
  2. [
  3.         isNil
  4.                 ^ true
  5. |
  6.         notNil
  7.                 ^ false
  8. |
  9.         printString
  10.                 ^ 'nil'
  11. ]
  12.