[Factory Method] Changed method accessor from public to protected for encapsulation purposes (kamranahmedse#93)

Author: LostKoder

README.md

@@ -168,7 +168,7 @@ abstract class HiringManager
 {
 
  // Factory method
- abstract public function makeInterviewer(): Interviewer;
+ abstract protected function makeInterviewer(): Interviewer;
 
  public function takeInterview()
  {
@@ -182,15 +182,15 @@ Now any child can extend it and provide the required interviewer
 ```php
 class DevelopmentManager extends HiringManager
 {
- public function makeInterviewer(): Interviewer
+ protected function makeInterviewer(): Interviewer
  {
  return new Developer();
  }
 }
 
 class MarketingManager extends HiringManager
 {
- public function makeInterviewer(): Interviewer
+ protected function makeInterviewer(): Interviewer
  {
  return new CommunityExecutive();
  }