reinforced collection setter methods
Merge pull request #21 from lmammino/6-reinforce-collection-setter-methods

merge #21 Reinforce collection setter methods (lmammino)

This PR was merged into lmammino:master branch.

Discussion
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|Q            |A  |
|---          |---|
|Bug Fix?     |n  |
|New Feature? |n  |
|BC Breaks?   |n  |
|Deprecations?|n  |
|Tests Pass?  |y  |
|Fixed Tickets|#6 |
|License      |MIT|
|Doc PR       |   |
                   

Closes #6

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Commits
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b3127bdcf6f08634f4d0bbbf5a41df3d25d1e5bc reinforced collection setter methods (lmammino)