@Override
			public boolean containsProperty(String name) {
				return ps.containsProperty(prefix + name);
			}
A decorator on another instance of {@link ModuleOptions} (in practice, one representing options to a composed module)
that will filter and remap property values exposed through its property source. Only values starting with a given
prefix are exposed (without the prefix).

@author Eric Bottard
spring-xd-module/src/main/java/org/springframework/xd/module/options/PrefixNarrowingModuleOptions.java