code: func (t *TraceServiceDefinition) GetSizeFormatOk() (string, bool) {
  	if t == nil || t.SizeFormat == nil {
  		return "", false
  	}
  	return *t.SizeFormat, true
  }
docs: // GetSizeFormatOk returns a tuple with the SizeFormat field if it's non-nil, zero value otherwise
  // and a boolean to check if the value has been set.