code: public static int readInt(final InputStream inputStream, final byte[] buffer) throws IOException {
          readFully(inputStream, buffer, 4);
          return readInt(buffer);
      }
docs: Reads and returns a single integer value from the input stream.
  
  @param inputStream the input stream to read from
  @param buffer the buffer to write the input stream bytes into
  @return the integer value
  @throws IOException if there's an error reading from the {@code inputStream}