Outline view in Spacemacs?

Question

Many IDEs have an outline panel, something like:

classes
   `--- Class A
   |      `-- open()
   |      `-- close()
   `--- Class B
          `-- fun()
functions
   `--- fun1()
   `--- fun2()

or something like this. I remember that Spacemacs had something like this (maybe listing of current file tags?), but I cannot find it, I forgot magic key-strokes for it. How to call it?

Answer 1

Maybe somebody looks for the same, so I will answer to myself, I just found THIS.