docs: public void setUidHash(String uidHash) {
  
  		Preconditions.checkNotNull(uidHash);
  		Preconditions.checkArgument(uidHash.matches("^[0-9A-Fa-f]{32}$"),
  				"Node hash must be a 32 character String that describes a hex code. Found: " + uidHash);
  
  		this.userProvidedNodeHash = uidHash;
  	}