function setTzid( $value, $params=FALSE ) {
    if( empty( $value ))
      return;
    $this->tzid['value']  = $value;
    $this->tzid['params'] = $this->_setParams( $params );
  }
function setTzid( $value, $params=FALSE ) {
    if( empty( $value ))
      return;
    $this->tzid['value']  = $value;
    $this->tzid['params'] = $this->_setParams( $params );
  }
function setTzid ( $ value , $ params = FALSE ) { if ( empty ( $ value ) ) return ; $ this -> tzid [ 'value' ] = $ value ; $ this -> tzid [ 'params' ] = $ this -> _setParams ( $ params ) ; }
set calendar component property tzid

@author Kjell-Inge Gustafsson <ical@kigkonsult.se>
@since 2.3.2 - 2007-11-25
@param string $value
@param array $params optional
@return void
set calendar component property tzid