anchor.diff:  but you are not forced to update production to unstable
   bleeding-edge versions.
   
  -```
  -$parser = (new ParserFactory)->create(ParserFactory::ONLY_PHP7);
  -$transpiler = new Transpiler();
  -
  -$nodes = $parser->parse($sourceCode);
  -$transpiler->transpile($nodes);
  -```
  -
   == Implemented AST modifiers:
   
   === PHP 7.1 -> 7.0
   
  -==== remove void return types
  +==== Remove void return types
   
   ```
   function foo(): void {}
  +
   # -->
  +
   function foo() {}
   ```
   
   __Limitations:__ `ReflectionFunctionAbstract::getReturnType()` and `hasReturnType()` will return `NULL` and `FALSE` respectively instead of original values.
   
  -==== remove class constant visibilities
  +==== Remove class constant visibilities
   
   ```
   class Foo {
  
positive.code: 	protected const B = 'b';
  	private const C = 'c';
  }
  # -->
  class Foo {
  	const A = 'a';
  	const B = 'b';
  
negative.code: = Transpiler
  :source-language: php
  
  PHP source code transformations.
  
  