Ignacio Etcheverry e7110984f3 Add Dictionary::erase_checked(key) method ...

Same as erase, but it returns a boolean value indicating whether the pair was erased or not.
This method should be removed during the next compatibility breakage, and 'Dictionary::erase(key)' should be changed to return a boolean.

(cherry picked from commit 2f69e36cef)

2018-07-28 16:06:30 +02:00

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