Small optimizations to reports.

app/Helpers/Collection/BalanceLine.php

@@ -2,6 +2,7 @@
 declare(strict_types = 1);
 namespace FireflyIII\Helpers\Collection;
 
+use Carbon\Carbon;
 use FireflyIII\Models\Budget as BudgetModel;
 use Illuminate\Support\Collection;
 
@@ -24,6 +25,11 @@ class BalanceLine
     /** @var BudgetModel */
     protected $budget;
 
+    /** @var  Carbon */
+    protected $startDate;
+    /** @var  Carbon */
+    protected $endDate;
+
     /** @var int */
     protected $role = self::ROLE_DEFAULTROLE;
 
@@ -113,6 +119,39 @@ class BalanceLine
         return '';
     }
 
+    /**
+     * @return Carbon
+     */
+    public function getStartDate()
+    {
+        return $this->startDate;
+    }
+
+    /**
+     * @param Carbon $startDate
+     */
+    public function setStartDate($startDate)
+    {
+        $this->startDate = $startDate;
+    }
+
+    /**
+     * @return Carbon
+     */
+    public function getEndDate()
+    {
+        return $this->endDate;
+    }
+
+    /**
+     * @param Carbon $endDate
+     */
+    public function setEndDate($endDate)
+    {
+        $this->endDate = $endDate;
+    }
+
+
     /**
      * If a BalanceLine has a budget/repetition, each BalanceEntry in this BalanceLine
      * should have a "spent" value, which is the amount of money that has been spent