Shows or hides the grid footer rows. The footer rows are hidden by default.
var value = obj.getFooterVisible();
obj.setFooterVisible(value);
obj.onFooterVisibleChanging = function(value){...};
obj.onFooterVisibleChanged = function(value){...};
obj.onFooterVisibleError = function(value){...};
obj.setFooterVisible(true);
Grid templates: footers
Footer model: count, indices, visible, height
Visible properties: selector, header, footer