THIS IS A TEST INSTANCE. ALL YOUR CHANGES WILL BE LOST!!!!
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- there must be a public method to use
- the method must not be void
- the method can be static or non-static
- the method must have 2 or more parameters
- the parameters is paired so the first 50% is applied to the
oldExchnage
oldExchange
and the reminder 50% is for thenewExchange
- .. meaning that there must be an equal number of parameters, eg 2, 4, 6 etc.
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