Package com.google.common.base

Changed Classes
Joiner	An object which joins pieces of text (specified as an array, Iterable, varargs or even a Map) with a separator. It either appends the results to an Appendable or returns them as a String. Example: {@snippet : Joiner joiner = Joiner.on("; ").skipNulls(); . . . return joiner.join("Harry", null, "Ron", "Hermione"); }
Optional	An immutable object that may contain a non-null reference to another object.