Sets or retrieves the tooltip text in the top-left corner of the grid (top selector tooltip).
var value = obj.getTopTooltip();
obj.setTopTooltip(value);
obj.onTopTooltipChanging = function(value){...};
obj.onTopTooltipChanged = function(value){...};
obj.onTopTooltipError = function(value){...};
obj.setTopText("top text");
obj.setTopImage("favorites");
obj.setTopTooltip("tooltip text"); // top selector tooltip
Grid templates: top selector
Top model: text, image, link, value, data, format
Tooltip properties: cell, selector, header, footer, bottom