simplify code

Author: staabm

src/Analyser/TypeSpecifier.php

@@ -1543,7 +1543,7 @@ private function specifyTypesFromConditionalReturnType(
 			return null;
 		}
 
-		$argsMap = [];
+		$argumentExpr = null;
 		$parameters = $parametersAcceptor->getParameters();
 		foreach ($call->getArgs() as $i => $arg) {
 			if ($arg->unpack) {
@@ -1558,29 +1558,29 @@ private function specifyTypesFromConditionalReturnType(
 				continue;
 			}
 
-			$argsMap['$' . $paramName] = $arg->value;
+			if ('$'. $paramName !== $returnType->getParameterName()) {
+				continue;
+			}
+
+			$argumentExpr = $arg->value;
+			break;
+		}
+
+		if ($argumentExpr === null) {
+			return null;
 		}
 
-		return $this->getConditionalSpecifiedTypes($returnType, $leftType, $rightType, $scope, $argsMap);
+		return $this->getConditionalSpecifiedTypes($returnType, $leftType, $rightType, $scope, $argumentExpr);
 	}
 
-	/**
-	 * @param array<string, Expr> $argsMap
-	 */
 	private function getConditionalSpecifiedTypes(
 		ConditionalTypeForParameter $conditionalType,
 		Type $leftType,
 		Type $rightType,
 		Scope $scope,
-		array $argsMap,
+		Expr $argumentExpr,
 	): ?SpecifiedTypes
 	{
-		$parameterName = $conditionalType->getParameterName();
-		if (!array_key_exists($parameterName, $argsMap)) {
-			return null;
-		}
-		$argumentExpr = $argsMap[$parameterName];
-
 		$targetType = $conditionalType->getTarget();
 		$ifType = $conditionalType->getIf();
 		$elseType = $conditionalType->getElse();