some cleanup as-per phpstan

app/Interfaces/ImportExport.php

@@ -24,6 +24,26 @@ class ImportExport
      */
     public static $columns = [];
 
+    /**
+     * @param mixed $row
+     * @return array
+     */
+    public function export($row): array
+    {
+        throw new \RuntimeException('export not implemented');
+    }
+
+    /**
+     * @param array $row
+     * @param mixed $index
+     * @return bool
+     * @throws \RuntimeException
+     */
+    public function import(array $row, $index): bool
+    {
+        throw new \RuntimeException('import not implemented');
+    }
+
     /**
      * Get the airline from the ICAO. Create it if it doesn't exist
      * @param $code

app/Models/Subfleet.php

@@ -8,13 +8,14 @@ use App\Models\Traits\ExpensableTrait;
 
 /**
  * Class Subfleet
- * @property int    id
- * @property string type
- * @property string name
- * @property string ground_handling_multiplier
- * @property Fare[] fares
- * @property float  cost_block_hour
- * @property float  cost_delay_minute
+ * @property int     id
+ * @property string  type
+ * @property string  name
+ * @property string  ground_handling_multiplier
+ * @property Fare[]  fares
+ * @property float   cost_block_hour
+ * @property float   cost_delay_minute
+ * @property Airline airline
  * @package App\Models
  */
 class Subfleet extends Model

app/Services/ImportExport/AircraftExporter.php

@@ -29,7 +29,7 @@ class AircraftExporter extends ImportExport
      * @param Aircraft $aircraft
      * @return array
      */
-    public function export(Aircraft $aircraft): array
+    public function export($aircraft): array
     {
         $ret = [];
         foreach(self::$columns as $column) {

app/Services/ImportExport/AirportExporter.php

@@ -27,7 +27,7 @@ class AirportExporter extends ImportExport
      * @param Airport $airport
      * @return array
      */
-    public function export(Airport $airport): array
+    public function export($airport): array
     {
         $ret = [];
         foreach(self::$columns as $column) {

app/Services/ImportExport/ExpenseExporter.php

@@ -30,7 +30,7 @@ class ExpenseExporter extends ImportExport
      * @param Expense $expense
      * @return array
      */
-    public function export(Expense $expense): array
+    public function export($expense): array
     {
         $ret = [];
 

app/Services/ImportExport/FareExporter.php

@@ -27,7 +27,7 @@ class FareExporter extends ImportExport
      * @param Fare $fare
      * @return array
      */
-    public function export(Fare $fare): array
+    public function export($fare): array
     {
         $ret = [];
         foreach(self::$columns as $column) {

app/Services/ImportExport/FlightExporter.php

@@ -28,7 +28,7 @@ class FlightExporter extends ImportExport
      * @param Flight $flight
      * @return array
      */
-    public function export(Flight $flight): array
+    public function export($flight): array
     {
         $ret = [];
         foreach(self::$columns as $column) {

app/Services/ImportExport/SubfleetExporter.php

@@ -29,7 +29,7 @@ class SubfleetExporter extends ImportExport
      * @param Subfleet $subfleet
      * @return array
      */
-    public function export(Subfleet $subfleet): array
+    public function export($subfleet): array
     {
         $ret = [];
         foreach(self::$columns as $column) {

app/Support/Money.php

@@ -20,7 +20,7 @@ class Money
     public static $subunit_multiplier;
 
     /**
-     * @param $amount
+     * @param mixed $amount
      * @return MoneyBase
      * @throws \UnexpectedValueException
      * @throws \InvalidArgumentException
@@ -32,7 +32,7 @@ class Money
 
     /**
      * Create from a dollar amount
-     * @param $amount
+     * @param mixed $amount
      * @return Money
      * @throws \UnexpectedValueException
      * @throws \InvalidArgumentException
@@ -46,7 +46,7 @@ class Money
 
     /**
      * Convert a whole unit into it's subunit, e,g: dollar to cents
-     * @param $amount
+     * @param mixed $amount
      * @return float|int
      */
     public static function convertToSubunit($amount)
@@ -72,7 +72,7 @@ class Money
 
     /**
      * Money constructor.
-     * @param $amount
+     * @param mixed $amount
      * @throws \UnexpectedValueException
      * @throws \InvalidArgumentException
      */
@@ -143,7 +143,7 @@ class Money
 
     /**
      * Add an amount
-     * @param $amount
+     * @param mixed $amount
      * @return Money
      * @throws \UnexpectedValueException
      * @throws \InvalidArgumentException
@@ -160,7 +160,7 @@ class Money
     }
 
     /**
-     * @param $percent
+     * @param mixed $percent
      * @return $this
      * @throws \OutOfBoundsException
      * @throws \InvalidArgumentException