docs: public MerkleTreeConfig setDepth(int depth) {
          if (depth < MIN_DEPTH || depth > MAX_DEPTH) {
              throw new IllegalArgumentException("Merkle tree depth " + depth + " is outside of the allowed range "
                      + MIN_DEPTH + "-" + MAX_DEPTH + ". ");
          }
          this.depth = depth;
          return this;
      }