makeWhileBody() {
    const context = this.loopContext;
    const choiceContext = this.choiceContext;
    const forkContext = this.forkContext;

    if (!choiceContext.processed) {
      choiceContext.trueForkContext.add(forkContext.head);
      choiceContext.falseForkContext.add(forkContext.head);
    }

    // Update state.
    if (context.test !== true) {
      context.brokenForkContext.addAll(choiceContext.falseForkContext);
    }
    forkContext.replaceHead(choiceContext.trueForkContext.makeNext(0, -1));
  }
Makes a code path segment for the body part of a WhileStatement.
@returns {void}