[darwin] update darwin code for fill-extrusion-vertical-gradient

1 files changed, 21 insertions, 0 deletions

diff --git a/platform/darwin/src/MGLFillExtrusionStyleLayer.h b/platform/darwin/src/MGLFillExtrusionStyleLayer.h
index 6e807c1b44..c35a2374ed 100644
--- a/platform/darwin/src/MGLFillExtrusionStyleLayer.h
+++ b/platform/darwin/src/MGLFillExtrusionStyleLayer.h
@@ -334,6 +334,27 @@ MGL_EXPORT
 
 @property (nonatomic, null_resettable) NSExpression *fillExtrusionTranslateAnchor __attribute__((unavailable("Use fillExtrusionTranslationAnchor instead.")));
 
+/**
+ Whether to apply a vertical gradient to the sides of a fill-extrusion layer. If
+ true, sides will be shaded slightly darker farther down.
+ 
+ The default value of this property is an expression that evaluates to `YES`.
+ Set this property to `nil` to reset it to the default value.
+ 
+ You can set this property to an expression containing any of the following:
+ 
+ * Constant Boolean values
+ * Predefined functions, including mathematical and string operators
+ * Conditional expressions
+ * Variable assignments and references to assigned variables
+ * Step functions applied to the `$zoomLevel` variable
+ 
+ This property does not support applying interpolation functions to the
+ `$zoomLevel` variable or applying interpolation or step functions to feature
+ attributes.
+ */
+@property (nonatomic, null_resettable) NSExpression *fillExtrusionVerticalGradient;
+
 @end
 
 /**