docs: def collect_nsarg_norms(self):
          """Adds canonical and decanonical values to NSArgs in AST
  
          This prepares the AST object for (de)canonicalization
          """
          start_time = datetime.datetime.now()
  
          self.ast = bel_utils.populate_ast_nsarg_defaults(self.ast, self.ast)
          self.ast.collected_nsarg_norms = True
          if (
              hasattr(self.ast, "bel_object")
              and self.ast.bel_object
              and self.ast.bel_object.type == "BELAst"
          ):
              self.ast.bel_object.collected_nsarg_norms = True
  
          end_time = datetime.datetime.now()
          delta_ms = f"{(end_time - start_time).total_seconds() * 1000:.1f}"
  
          log.info("Timing - prepare nsarg normalization", delta_ms=delta_ms)
  
          return self