code: public static Triple<String, String, String> buildIndexes(final GeneratedTypeElement entity, boolean unique, int counter) {
  		Triple<String, String, String> result = new Triple<>();
  		result.value0 = "";
  		result.value1 = "";
  		result.value2 = "";
  
  		List<String> indexes = entity.index;
  		String uniqueString;
  
  		uniqueString = "UNIQUE ";
  
  		if (indexes == null || indexes.size() == 0)
  			return result;
  
  		List<String> listCreateIndex = new ArrayList<>();
  		List<String> listDropIndex = new ArrayList<>();
  		for (String index : indexes) {
  			String createIndex = String.format(" CREATE %sINDEX idx_%s_%s on %s (%s)", uniqueString,
  					entity.getTableName(), counter++, entity.getTableName(), index);
  			String dropIndex = String.format(" DROP INDEX IF EXISTS idx_%s_%s", entity.getTableName(), counter);
  
  			listCreateIndex.add(createIndex);
  			listDropIndex.add(dropIndex);
  		}
  
  		result.value0 = StringUtils.join(listCreateIndex, ";");
  		result.value1 = StringUtils.join(listDropIndex, ";");
  
  		return result;
  	}
docs: A generated element can have only a primary key and two FK.
  
  @param entity
  the entity
  @param unique
  the unique
  @param counter
  the counter
  @return the pair