original_string: protected function nullableChanged($field = null)
      {
          if (!$field) {
              $function = debug_backtrace()[1]['function'];
              $field    = lcfirst(substr($function, 3));
          }
  
          $this->nullableChanged[$field] = true;
      }
code: protected function nullableChanged($field = null)
      {
          if (!$field) {
              $function = debug_backtrace()[1]['function'];
              $field    = lcfirst(substr($function, 3));
          }
  
          $this->nullableChanged[$field] = true;
      }
code_tokens: protected function nullableChanged ( $ field = null ) { if ( ! $ field ) { $ function = debug_backtrace ( ) [ 1 ] [ 'function' ] ; $ field = lcfirst ( substr ( $ function , 3 ) ) ; } $ this -> nullableChanged [ $ field ] = true ; }
docstring: Trigger the fact the nullable changed
  
  @param null $field
docstring_tokens: Trigger the fact the nullable changed