private function getExpression(Node $node) {
		if ($node instanceof ConstFetch) {
			$const = $node->name->parts[0];
			if (isset($this->constMap[$const])) {
				return $this->constMap[$const];
			}
	
			return $const;
		}
		
		if ($node instanceof ClassConstFetch) {
			return $node->class->parts[0] . '::' . $node->name;
		}
	
		if ($node instanceof MagicConst) {
			return $node->getName();
		}
		
		if ($node instanceof Array_) {
			$prettyPrinter = new PrettyPrinter();
			return $prettyPrinter->prettyPrintExpr($node);
		}
	}