The array of the header row indices (extended grid). Can be used to show/hide or change the order of the header rows.
var value = obj.getHeaderIndices();
obj.setHeaderIndices(value);
obj.onHeaderIndicesChanging = function(value){...};
obj.onHeaderIndicesChanged = function(value){...};
obj.onHeaderIndicesError = function(value){...};
obj.setHeaderIndices([2,1,0]);
Grid templates: headers
Header model: count, indices, visible, height
Indices properties: row, column, header, footer