code: public static synchronized FormInputValueHelper getInstance(
  			InputSpecification inputSpecification, FormFillMode formFillMode) {
  		if (instance == null)
  			instance = new FormInputValueHelper(inputSpecification,
  					formFillMode);
  		return instance;
  	}
docs: Creates or returns the instance of the helper class.
  
  @param inputSpecification the input specification.
  @param formFillMode       if random data should be used on the input fields.
  @return The singleton instance.