/guava/android/guava/src/com/google/common/base/Joiner.java
appendable.append ( toString ( parts.next ( ) ) ) ;
} @CanIgnoreReturnValue public <A extends Appendable> A appendTo(A appendable, Iterator<? extends @Nullable Object> parts) throws IOException { checkNotNull(appendable); if (parts.hasNext()) { <extra_id_0> while (parts.hasNext()) { appendable.append(separator); appendable.append(toString(parts.next())); } } return appendable;