add Cnm and Anm to CollectionUtil

[javeme]

Change-Id: I873e5c41229a8743ca5753d11c3b5e608b2e9298

[codecov]

Codecov Report

❗ No coverage uploaded for pull request base (master@f2e8384). Click here to learn what that means.
The diff coverage is n/a.

@@            Coverage Diff            @@
##             master     #101   +/-   ##
=========================================
  Coverage          ?   93.15%           
  Complexity        ?       65           
=========================================
  Files             ?        9           
  Lines             ?      263           
  Branches          ?       22           
=========================================
  Hits              ?      245           
  Misses            ?        8           
  Partials          ?       10           

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