in sample/frontend/agr-lib/src/lib/grid/agr-engine.ts [552:562]
filterChild(children: Row<T>[], columnDef: ColumnDef) {
if (children) {
for (const child of children) {
const logicResult = this.filterByColumn(columnDef, child) || this.filterChild(child.children, columnDef);
if (logicResult) {
return true;
}
}
}
return false;
}