src/main/java/org/apache/commons/io/output/ProxyCollectionWriter.java [85:103]:
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            afterWrite(1);
        } catch (final IOException e) {
            handleIOException(e);
        }
        return this;
    }

    /**
     * Invokes the delegates' {@code append(CharSequence)} methods.
     *
     * @param csq The character sequence to write
     * @return this writer
     * @throws IOException if an I/O error occurs.
     */
    @Override
    public Writer append(final CharSequence csq) throws IOException {
        try {
            final int len = IOUtils.length(csq);
            beforeWrite(len);
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src/main/java/org/apache/commons/io/output/ProxyWriter.java [75:93]:
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            afterWrite(1);
        } catch (final IOException e) {
            handleIOException(e);
        }
        return this;
    }

    /**
     * Invokes the delegate's {@code append(CharSequence)} method.
     * @param csq The character sequence to write
     * @return this writer
     * @throws IOException if an I/O error occurs.
     * @since 2.0
     */
    @Override
    public Writer append(final CharSequence csq) throws IOException {
        try {
            final int len = IOUtils.length(csq);
            beforeWrite(len);
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