Title: MET55-J. Return an empty array or collection instead of a null value for methods that return an array or collection  
Author: Dhruv Mohindra Jul 19, 2008
Last Changed by: Will Snavely Nov 16, 2017
Tiny Link: (useful for email) https://wiki.sei.cmu.edu/confluence/x/JzZGBQ
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SEI CERT Oracle Coding Standard for Java (2)
    Page: ERR52-J. Avoid in-band error indicators
    Page: OBJ55-J. Remove short-lived objects from long-lived container objects
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    Page: Rec. 06. Methods (MET)