/guava/guava/src/com/google/common/base/Joiner.java
appendable.append( joiner.toString( null.getKey( ) ) ) ;
appendable.append ( joiner.toString ( e.getKey ( ) ) ) ;
appendable.append(joiner.toString(entry.getKey())); appendable.append(keyValueSeparator); appendable.append(joiner.toString(entry.getValue())); while (parts.hasNext()) { appendable.append(joiner.separator); Entry<?, ?> e = parts.next(); <extra_id_0> appendable.append(keyValueSeparator); appendable.append(joiner.toString(e.getValue())); } } return appendable; }