code: private String setterName(String fieldName) {
          return new StringBuilder(SET_PREFIX)
                  .append(fieldName.substring(0, 1).toUpperCase(Locale.ENGLISH))
                  .append(fieldName.substring(1))
                  .toString();
      }
docs: Retrieve the setter name from the field name.
  
  <p>Implementation is based on the code of {@link java.beans.Introspector}.</p>
  
  @param fieldName the Field name
  @return Setter name.