GraphQL\Validator\ValidationContext::getSchema PHP Method

    function getSchema()
    {
        return $this->schema;
    }

 public function __invoke(ValidationContext $context)
 {
     $varDefMap = new \ArrayObject();
     $visitedFragmentNames = new \ArrayObject();
     return ['visitSpreadFragments' => true, Node::OPERATION_DEFINITION => function () use(&$varDefMap, &$visitedFragmentNames) {
         $varDefMap = new \ArrayObject();
         $visitedFragmentNames = new \ArrayObject();
     }, Node::VARIABLE_DEFINITION => function (VariableDefinition $varDefAST) use($varDefMap) {
         $varDefMap[$varDefAST->variable->name->value] = $varDefAST;
     }, Node::FRAGMENT_SPREAD => function (FragmentSpread $spreadAST) use($visitedFragmentNames) {
         // Only visit fragments of a particular name once per operation
         if (!empty($visitedFragmentNames[$spreadAST->name->value])) {
             return Visitor::skipNode();
         }
         $visitedFragmentNames[$spreadAST->name->value] = true;
     }, Node::VARIABLE => function (Variable $variableAST) use($context, $varDefMap) {
         $varName = $variableAST->name->value;
         $varDef = isset($varDefMap[$varName]) ? $varDefMap[$varName] : null;
         $varType = $varDef ? TypeInfo::typeFromAST($context->getSchema(), $varDef->type) : null;
         $inputType = $context->getInputType();
         if ($varType && $inputType && !$this->varTypeAllowedForType($this->effectiveType($varType, $varDef), $inputType)) {
             return new Error(Messages::badVarPosMessage($varName, $varType, $inputType), [$variableAST]);
         }
     }];
 }