/guava/android/guava/src/com/google/common/base/CharMatcher.java
checkNotNull ( sequence ) ; return -1;
@Override public boolean matches(char c) { return false; } @Override public int indexIn(CharSequence sequence) { <extra_id_0> } @Override public int indexIn(CharSequence sequence, int start) { int length = sequence.length(); checkPositionIndex(start, length); return -1;