Zephir\Variable::getClassTypes PHP Method

    public function getClassTypes()
    {
        return $this->classTypes;
    }

 /**
  * Examine internal class information and returns the method called
  *
  * @param CompilationContext $compilationContext
  * @param Variable $caller
  * @param string $methodName
  * @return array
  */
 private function getRealCalledMethod(CompilationContext $compilationContext, Variable $caller, $methodName)
 {
     $compiler = $compilationContext->compiler;
     $numberPoly = 0;
     $method = null;
     if ($caller->getRealName() == 'this') {
         $classDefinition = $compilationContext->classDefinition;
         if ($classDefinition->hasMethod($methodName)) {
             $numberPoly++;
             $method = $classDefinition->getMethod($methodName);
         }
     } else {
         $classTypes = $caller->getClassTypes();
         foreach ($classTypes as $classType) {
             if ($compiler->isClass($classType) || $compiler->isInterface($classType) || $compiler->isBundledClass($classType) || $compiler->isBundledInterface($classType)) {
                 if ($compiler->isInterface($classType)) {
                     continue;
                 }
                 if ($compiler->isClass($classType)) {
                     $classDefinition = $compiler->getClassDefinition($classType);
                 } else {
                     $classDefinition = $compiler->getInternalClassDefinition($classType);
                 }
                 if (!$classDefinition) {
                     continue;
                 }
                 if ($classDefinition->hasMethod($methodName) && !$classDefinition->isInterface()) {
                     $numberPoly++;
                     $method = $classDefinition->getMethod($methodName);
                 }
             }
         }
     }
     return array($numberPoly, $method);
 }