code: public static String toCamelName(String value) {
          String[] partOfNames = value.split("_");
  
          StringBuilder sb = new StringBuilder(partOfNames[0]);
          for (int i = 1; i < partOfNames.length; i++) {
              sb.append(partOfNames[i].substring(0, 1).toUpperCase());
              sb.append(partOfNames[i].substring(1));
          }
          return sb.toString();
      }
docs: eg: user_id -> userId
  
  @param value
  @return