Do not specify that given functions must be void as they needn't be.
Do not specify that given functions must be void as they needn't be.

RELNOTES: Update return type on goog.labs.collections.iterables.forEach

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google/closure-library,lucidsoftware/closure-library,lucidsoftware/closure-library,google/closure-library,lucidsoftware/closure-library,google/closure-library,google/closure-library,google/closure-library,lucidsoftware/closure-library