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The convention in Smalltalk is to use setter and getter names based on
instance variable names. Thus, fCalories: and fCalories are
the setter and getter of the fCalories instance variable, with the
colon of the setter distinguishing the setter from the colon-free getter.
If you wish to express more clearly that a method is a setter or a getter,
you can use names such as setFCalories: and getFCalories; if
you do, however, many Smalltalk programmers will consider your code
oafish.