check

pub fn check(self: *@This(), which: Which) void {
        switch (which) {
            .renderPresent => {
                if (self.has_renderPresent) warnDoubleCall(which);
                self.has_renderPresent = true;
            },
            .setCursor => {
                if (self.has_setCursor) warnDoubleCall(which);
                self.has_setCursor = true;
            },
            .textInputRect => {
                if (self.has_textInputRect) warnDoubleCall(which);
                self.has_textInputRect = true;
            },
        }
    }