public Builder<G, C> fitnessExecutor(final BatchExecutor executor) {
			_fitnessExecutor = requireNonNull(executor);
			return this;
		}
This executor is used for evaluating the fitness functions.

@apiNote
If a dedicated {@link Evaluator} is defined, this executor is not
used.

@since 8.0

@param executor the executor used for evaluating the fitness functions
@return {@code this} builder, for command chaining
jenetics/src/main/java/io/jenetics/engine/Engine.java