Selector node for nodes Shaders/Maps/Values

The idea was taken from the Corona render. it is very comfortable. If you put a map in the selector, then you can, for example, quickly change the texture of the floor (for example), if you put a Shader in the selector, then you can quickly change the material of the object, for example, if it is not the last one, but is part of the MixShader, for example, change the paint color car, on which there are other layers, such as decals.