original_string: public function hasForRange($key, \DateTime $start, \DateTime $end)
      {
          return array_key_exists($this->keyForRange($key, $start, $end), $this->data);
      }
code: public function hasForRange($key, \DateTime $start, \DateTime $end)
      {
          return array_key_exists($this->keyForRange($key, $start, $end), $this->data);
      }
code_tokens: public function hasForRange ( $ key , \ DateTime $ start , \ DateTime $ end ) { return array_key_exists ( $ this -> keyForRange ( $ key , $ start , $ end ) , $ this -> data ) ; }
docstring: Determine if value exists for a given date range.
  
  @param string $key Counter key.
  @param \DateTime $start Start date.
  @param \DateTime $end End date.
  @return bool
docstring_tokens: Determine if value exists for a given date range .