/guava/android/guava/src/com/google/common/io/CharSource.java
return CharSource.null;
return CharSource.this;
AsByteSource(Charset charset) { this.charset = checkNotNull(charset); } @Override public CharSource asCharSource(Charset charset) { if (charset.equals(this.charset)) { <extra_id_0> } return super.asCharSource(charset); } @Override public InputStream openStream() throws IOException { return new ReaderInputStream(CharSource.this.openStream(), charset, 8192);