@Override
	public String toString() {
		return password;
	}
This module option type represents a password. As such it will allow other components
within Spring XD to identify an option as password, and thus the ability to
provide custom view options (E.g. a password input field instead of a simple text box).

@author Gunnar Hillert
@since 1.0
spring-xd-module-spi/src/main/java/org/springframework/xd/module/options/types/Password.java