question: implements java.io.closeable . concode_field_sep byte[] readBuffer concode_elem_sep long bytesRead concode_elem_sep int readBufferBlocks concode_elem_sep InputStream readStream concode_elem_sep int compressionType concode_field_sep int getReadBufferBlocks concode_elem_sep void readBlock concode_elem_sep void readBlocks concode_elem_sep void readCompressedBlocks concode_elem_sep boolean readNextHeaderBlock
target: void function ( ) { if ( readStream == null ) { return ; } try { readStream . close ( ) ; } finally { readStream = null ; } }