It was possible to set context pointers for buttons via the layout, but not for buttons in places where the layout system wasn't used (where buttons are placed manually). This is needed for buttons in the Outliner, see D14653.
It was possible to set context pointers for buttons via the layout, but not for buttons in places where the layout system wasn't used (where buttons are placed manually). This is needed for buttons in the Outliner, see D14653.