code: public static String determineFieldName(@Nonnull final String methodName) {
  		Check.notEmpty(methodName, "methodName");
  		final Matcher m = PATTERN.matcher(methodName);
  		Check.stateIsTrue(m.find(), "passed method name '%s' is not applicable", methodName);
  		return m.group(2).substring(0, 1).toLowerCase() + m.group(2).substring(1);
  	}
docs: Determines the field name based on an accessor method name.
  
  @param methodName
  an accessor method name
  @return the resulting field name