import jetbrains.mps.openapi.editor.cells.EditorCell; import jetbrains.mps.openapi.editor.cells.EditorCell_SubstituteInfo; // get a reference to the editor cell EditorCell cell = ... // create a substitute info object with a custom tooltip EditorCell_SubstituteInfo substituteInfo = new EditorCell_SubstituteInfo(); substituteInfo.setTooltipText("This is a custom tooltip"); // set the substitute info for the cell cell.setSubstituteInfo(substituteInfo);In this example, we import the necessary classes from the `jetbrains.mps.openapi.editor.cells` package. We then create an instance of the `EditorCell_SubstituteInfo` class and set a custom tooltip text. Finally, we set the substitute information for the editor cell using the `setSubstituteInfo` method. Another example of using the `setSubstituteInfo` method is to provide a custom icon for the editor cell. This can be done using the `EditorCell_SubstituteInfo.setIcon` method. Overall, the `jetbrains.mps.openapi.editor.cells` package provides a rich set of APIs for customizing the editor cells in the MPS framework.