code: public static String getFieldName(final String methodName) {
  
          if (isGetterMethod(methodName)) {
              return decapitalizeFirstCharOfString(stripGetterPrefix(methodName));
          }
  
          return null;
      }
docs: Strips getter prefix from method name.
  
  @param methodName the name of the method to be processed
  @return the stripped method name with Decapitalized first letter or null if passed method name has no getter prefix.