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export default class ZStream {  /* next input byte */  input: Uint8Array | null = null; // JS specific, because we have no pointers  next_in = 0;  /* number of bytes available at input */  avail_in = 0;  /* total number of input bytes read so far */  total_in = 0;  /* next output byte should be put there */  output: Uint8Array | null = null; // JS specific, because we have no pointers  next_out = 0;  /* remaining free space at output */  avail_out = 0;  /* total number of bytes output so far */  total_out = 0;  /* last error message, NULL if no error */  msg = "" /*Z_NULL*/;  /* not visible by applications */  state: any = null;  /* best guess about the data type: binary or text */  data_type = 2 /*Z_UNKNOWN*/;  /* adler32 value of the uncompressed data */  adler = 0;}