Introduce goog.functions.UNDEFINED and goog.functions.EMPTY as replacements for `goog.nullFunction` RELNOTES[NEW]: Introduce goog.functions.UNDEFINED and goog.functions.EMPTY
Introduce goog.functions.UNDEFINED and goog.functions.EMPTY as replacements for `goog.nullFunction`
RELNOTES[NEW]: Introduce goog.functions.UNDEFINED and goog.functions.EMPTY

PiperOrigin-RevId: 341476991

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