This interface represents a builder that creates initial context factories.
The JNDI framework allows for different initial context implementations
to be specified at runtime. An initial context is created using
an initial context factory. A program can install its own builder
that creates initial context factories, thereby overriding the
default policies used by the framework, by calling
NamingManager.setInitialContextFactoryBuilder().
The InitialContextFactoryBuilder interface must be implemented by
such a builder.