Convert Value to interface, extract functionality to CoreValue and create a NotAValue class#282

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jvdb merged 18 commits intofrom-list-of-optionals-to-optional-listfrom value-interface

Feb 16, 2019

+597-371

Commits on Feb 7, 2019

Commits on Feb 8, 2019

#280 : Replaced reference checks on NOT_A_VALUE with calls to equals().
jvdb
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Commits on Feb 12, 2019