Added a IsUndefined() method for all Primitives

Author: georgedeploy

src/Bool/BoolStandard.php

@@ -126,4 +126,9 @@ public function isEmpty(): bool
     {
         return false;
     }
+
+    public function isUndefined(): bool
+    {
+        return false;
+    }
 }

src/Bool/FalseStandard.php

@@ -130,4 +130,9 @@ public function isEmpty(): bool
     {
         return false;
     }
+
+    public function isUndefined(): bool
+    {
+        return false;
+    }
 }

src/Bool/TrueStandard.php

@@ -130,4 +130,9 @@ public function isEmpty(): bool
     {
         return false;
     }
+
+    public function isUndefined(): bool
+    {
+        return false;
+    }
 }

src/DateTime/DateTimeAtom.php

@@ -110,4 +110,9 @@ public function isEmpty(): bool
     {
         return false;
     }
+
+    public function isUndefined(): bool
+    {
+        return false;
+    }
 }

src/DateTime/DateTimeRFC3339.php

@@ -110,4 +110,9 @@ public function isEmpty(): bool
     {
         return false;
     }
+
+    public function isUndefined(): bool
+    {
+        return false;
+    }
 }

src/DateTime/DateTimeRFC3339Extended.php

@@ -111,4 +111,9 @@ public function isEmpty(): bool
     {
         return false;
     }
+
+    public function isUndefined(): bool
+    {
+        return false;
+    }
 }

src/DateTime/DateTimeW3C.php

@@ -110,4 +110,9 @@ public function isEmpty(): bool
     {
         return false;
     }
+
+    public function isUndefined(): bool
+    {
+        return false;
+    }
 }

src/DateTime/Timestamp/TimestampMilliseconds.php

@@ -145,4 +145,9 @@ public function isEmpty(): bool
     {
         return false;
     }
+
+    public function isUndefined(): bool
+    {
+        return false;
+    }
 }

src/DateTime/Timestamp/TimestampSeconds.php

@@ -114,4 +114,9 @@ public function isEmpty(): bool
     {
         return false;
     }
+
+    public function isUndefined(): bool
+    {
+        return false;
+    }
 }

src/Float/FloatNonNegative.php

@@ -112,4 +112,9 @@ public function isEmpty(): bool
     {
         return false;
     }
+
+    public function isUndefined(): bool
+    {
+        return false;
+    }
 }