src/main/java/org/apache/commons/io/input/ProxyInputStream.java [320:342]:
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            afterRead(n);
            return n;
        } catch (final IOException e) {
            handleIOException(e);
            return EOF;
        }
    }

    /**
     * Invokes the delegate's {@link InputStream#read(byte[], int, int)} method.
     *
     * @param b   the buffer to read the bytes into.
     * @param off The start offset.
     * @param len The number of bytes to read.
     * @return the number of bytes read or {@link IOUtils#EOF EOF} if we reached the end of stream.
     * @throws IOException
     *                     <ul>
     *                     <li>If the first byte cannot be read for any reason other than the end of the file,
     *                     <li>if the input stream has been closed, or</li>
     *                     <li>if some other I/O error occurs.</li>
     *                     </ul>
     */
    @Override
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src/main/java/org/apache/commons/io/input/ProxyReader.java [194:209]:
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            afterRead(n);
            return n;
        } catch (final IOException e) {
            handleIOException(e);
            return EOF;
        }
    }

    /**
     * Invokes the delegate's {@code read(CharBuffer)} method.
     * @param target the char buffer to read the characters into
     * @return the number of characters read or -1 if the end of stream
     * @throws IOException if an I/O error occurs.
     * @since 2.0
     */
    @Override
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