docstr: Decrement the current count by 1.
docstr_tok: ["Decrement","the","current","count","by","1","."]
code: def dec(self, n: int = 1):
      """
      Decrement the current count by 1.
      """
      self.inc(-n)
  
imports: from pyflink.metrics import Counter
label_desc: Use image node_id 3 for calling the CounterImpl obj's underlying member method code with example usage: obj.dec(n) without return types