code: public static String getModifierSuffix(String fullName, String baseName) {
          if (fullName.equals(baseName)) {
              return null;
          }
          int indexOfOpeningBracket = fullName.indexOf(MODIFIER_OPENING_TOKEN);
          return fullName.substring(indexOfOpeningBracket, fullName.length());
      }
docs: Get modifier suffix if fullName contains any otherwise returns null.
  
  In contains no validation of input parameters as it assumes the validation
  has been already done by {@link #removeModifierSuffix(String)}
  
  @param fullName
  @param baseName as returned by {@link #removeModifierSuffix(String)}
  @return modifier suffix or null if no suffix is present