public Builder<T> N(final String name, final Object annotation) {
				return E(new NonTerminal<>(name, annotation));
			}
Add an expression which consists solely of the given non-terminal
symbol.

@param name the symbol name
@param annotation the symbol annotation
@return {@code this} builder for method chaining
jenetics.ext/src/main/java/io/jenetics/ext/grammar/Cfg.java