Ag-Grid Angular components with several levels

We are using ag-grid for Angular in an existing project with nested grids. [login to view URL] Several examples of nested grids are available but no one seems to be working with different the columns. [login to view URL] We need something like that: Level one: column a, column b, column c -Level two: column d, column e, column f, column g --Level three: column h, column i When we add a new register that belongs to level one, or level 2 or level 3, the page must display the new element visible in the grid level that has been expanded. The project consists on a basic application that uses Angular as front-end with at least a screen that displays a nested greed with 3 levels and different columns. The application will be able to add new fields for every level with the results displayed in the same screen after they have been introduced.