Add differential.setdiffproperty to gonduit

differential.go

@@ -66,3 +66,13 @@ func (c *Conn) DifferentialGetRawDiff(req requests.DifferentialGetRawDiffRequest
 
 	return &res, nil
 }
+
+// DifferentialSetDiffProperty performs a call to differential.setdiffproperty
+func (c *Conn) DifferentialSetDiffProperty(req requests.DifferentialSetDiffPropertyRequest) error {
+	var res *responses.Empty
+	if err := c.Call("differential.setdiffproperty", &req, &res); err != nil {
+		return err
+	}
+
+	return nil
+}

requests/differential_setdiffproperty.go

@@ -0,0 +1,12 @@
+package requests
+
+// DifferentialSetDiffPropertyRequest represents a request to the differential.setdiffproperty endpoint.
+type DifferentialSetDiffPropertyRequest struct {
+	// ID of the diff (not revision) to set the property on.
+	DiffID uint64 `json:"diff_id"`
+	// Name of the property to set
+	Name string `json:"name"`
+	// Value of the property. Must be a JSON-encoded string representing an object or array of objects.
+	Data string `json:"data"`
+	Request
+}

responses/empty.go

@@ -0,0 +1,4 @@
+package responses
+
+// Empty represents an empty response
+type Empty struct{}