com.google.gdata.util.common.base
Interfaces 
Escaper
Predicate
Classes 
CharEscaper
CharEscaperBuilder
CharEscapers
CharMatcher
Charsets
Join
Joiner
Joiner.MapJoiner
Objects
Objects.ToStringHelper
Pair
PercentEscaper
Preconditions
StringUtil
UnicodeEscaper
Exceptions 
Join.JoinException
Annotation Types 
Nullable