/guava/guava/src/com/google/common/io/CharSequenceReader.java
private short pos;
private int pos;
import javax.annotation.CheckForNull; @J2ktIncompatible @GwtIncompatible @ElementTypesAreNonnullByDefault final class CharSequenceReader extends Reader { @CheckForNull private CharSequence seq; <extra_id_0> private int mark; public CharSequenceReader(CharSequence seq) { this.seq = checkNotNull(seq); } private void checkOpen() throws IOException { if (seq == null) {