class_docstr: WIP.
class_docstr_tok: ["WIP","."]
docstr: WIP.
docstr_tok: ["WIP","."]
code: def sel_to_str(self, sel: dict, isel: dict):
      """WIP."""
      if sel:
          return ", ".join(
              [
                  self.dim_coord_to_str(dim, v, i)
                  for (dim, v), (_, i) in zip(sel.items(), isel.items())
              ]
          )
      return ""
  
imports: from typing import Union
label_desc: Use image node_id 2 for calling the BaseLabeller obj's underlying member method code with example usage: obj.sel_to_str(sel, isel) and returns: str, str