setSelectedContexts(oSelectedContexts) {
			var aSelectedRoles = oSelectedContexts.role.map(function(oRole) {
				return {id: oRole, description: ""};
			});
			var oSelectedContextsModel = this.getModel("selectedContexts");
			oSelectedContextsModel.setProperty("/selected", aSelectedRoles);
			oSelectedContextsModel.refresh(true);
		}
Sets selected contexts.

@param {sap.ui.fl.variants.context.Component.SelectedContexts} oSelectedContexts - Selected contexts