feat(role): add is_gradient and is_holographic properties

changelog/1379.feature.rst

@@ -0,0 +1 @@
+Adds Role.is_gradient and Role.is_holographic properties to check whether a role is gradient or holographic.

disnake/role.py

@@ -445,6 +445,26 @@ def tertiary_color(self) -> Optional[Colour]:
         """
         return self.tertiary_colour
 
+    @property
+    def is_gradient(self) -> bool:
+        """Whether the role is gradient.
+
+        .. versionadded:: 2.11.1
+
+        :return type: :class:`bool`
+        """
+        return self.secondary_color is not None and self.tertiary_color is None
+
+    @property
+    def is_holographic(self) -> bool:
+        """Whether the role is holographic.
+
+        .. versionadded:: 2.11.1
+
+        :return type: :class:`bool`
+        """
+        return self.tertiary_color is not None
+
     @property
     def icon(self) -> Optional[Asset]:
         """Optional[:class:`Asset`]: Returns the role's icon asset, if available.