code: public int createIds(String type) {
  
  		List<String> tables = getMissing(type);
  
  		for (String tableName : tables) {
  			getOrCreate(tableName);
  		}
  
  		return tables.size();
  	}
docs: Create contents ids for contents of the data type and currently without
  
  @param type
  contents data type
  @return newly created contents ids count