static void copy(final byte[] src, final int srcPos, final byte[] dst, final int dstPos) {
    System.arraycopy(src, srcPos, dst, dstPos, Math.min(src.length - srcPos, dst.length - dstPos));
  }
Create a corpus

@param dirs The directory to store the corpus files
testfuzz/src/main/java/org/hyperledger/besu/testfuzz/javafuzz/Corpus.java