Sets the context in which string resources can be fetched.
If this context has not yet been set, then the class will not be able to
fetch string resources to assemble the nonsense string.
Implementations of this interface should also provide a constructor which
sets this context upfront.
ctx - the context in which string resources are available
Generates the nonsense string.
The algorithm for creating the string is implementation-dependent.
a fully-formed sentence from randomly-selected words