/guava/guava/src/com/google/common/base/CharMatcher.java
first = checkNotNull( a) ;second = checkNotNull( b) ;
second = checkNotNull ( b ) ;
} private static final class And extends CharMatcher { final CharMatcher first; final CharMatcher second; And(CharMatcher a, CharMatcher b) { first = checkNotNull(a); <extra_id_0> } @Override public boolean matches(char c) { return first.matches(c) && second.matches(c); } @J2ktIncompatible