changes to allow efficient tk/incr tcl compatible configure/cget - refactored code to allow to parameterize handling of required flag for pa…
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changes to allow efficient tk/incr tcl compatible configure/cget - refactored code to allow to parameterize handling of required flag for parameters - don't flag an error when configure is called on an initialized object (logic: if the object is initialized, configure must have been called before, and the required action must have been already taken).
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