return active start value.

@return float
19250
public function GetActiveStartValue()
    {
        $sStartValue = false;
        if (is_array($this->aActiveFilterData) && array_key_exists(self::URL_PARAMETER_FILTER_START_VALUE, $this->aActiveFilterData)) {
            $sStartValue = $this->aActiveFilterData[self::URL_PARAMETER_FILTER_START_VALUE];
        }

        return $sStartValue;
    }
794467
public function isStarted()
    {
        return (!is_null($this->userSession) && !is_null($this->getUserConfiguration()->getStartAt())) &&
            !is_null($this->session->get('user_session'));
    }
716599
public function start(): bool
    {
        if (!is_null($this->expiration)) {
            $this->expiration->start();
        }
        if (!is_null($this->fingerprint)) {
            $this->fingerprint->start();
        }
        if (!isset($_SESSION['__HANDLER_INITIATED'])) {
            return $this->initialSessionStart();
        } else {
            return $this->laterSessionStart();
        }
    }
19150
public function getAge() {
		if($this->Started) {
			$started = intval($this->dbObject('Started')->Format('U'));
			$now = intval(SS_Datetime::now()->Format('U'));
			if($started && $now) return $now - $started;
		}
		return 0;
	}
1343611
public function getActive()
    {
        if (count($this->active) < 1) {
            return null;
        }
        while (time() > current($this->active)) {
            $key = key($this->active);
            $this->expired[$key] = current($this->active);
            $this->increment($this->active);
            unset($this->active[$key]);
            if (count($this->active) < 1) {
                return null;
            }
        }
        $active = key($this->active);
        $this->increment($this->active);
        return $active;
    }
81256
public function current()
    {
        if (isset($this->buffer[$this->position])) {
            return $this->buffer[$this->position];
        }
        $this->ensurePosition();
        $data = $this->resultSet->current();
        $this->buffer[$this->position] = $data;
        return $data;
    }
820861
public function first()
    {
        $this->index = \count($this->children) ? 0 : (-1);

        if ($this->index === -1) {
            return null;
        }

        return $this->current();
    }
230029
public function getActualValue()
    {
        $val = $this->value + ($this->tax_included ? 0 : $this->tax_value);
        return (float) $val;
    }
429522
public function getStartDate() : ?string 
    {
        if ( ! $this->hasStartDate()) {
            $this->setStartDate($this->getDefaultStartDate());
        }
        return $this->startDate;
    }
822648
public function getInitial()
    {
        $initial = [
            (float) $this->InitialRotationH,
            (float) $this->InitialRotationV
        ];
        
        return json_encode($initial);
    }
773655
public function getPageStart()
    {
        $request = $this->getRequest();
        if ($this->pageStart === null) {
            if ($request
                && isset($request[$this->getPaginationGetVar()])
                && $request[$this->getPaginationGetVar()] > 0
            ) {
                $this->pageStart = (int)$request[$this->getPaginationGetVar()];
            } else {
                $this->pageStart = 0;
            }
        }

        return $this->pageStart;
    }
1359475
public function getCurrentValue()
    {
        $func = $this->getValueCalculator();
        $currentDataRow =  $this->getGrid()->getCurrentRow();
        if ($func !== null) {
            return call_user_func($func, $currentDataRow);
        } else {
            return mp\getValue($currentDataRow, $this->getDataFieldName());
        }
    }
87413
public function getTopStartArticle()
    {
        if ($this->_oTopArticle === null) {
            $this->_oTopArticle = false;
            if ($this->getTopStartActionArticles()) {
                return $this->_oTopArticle;
            }
        }

        return $this->_oTopArticle;
    }
809726
public function isStarted()
    {
        $started = \session_status() === PHP_SESSION_ACTIVE;

        // if the session was started externally, move the flash values forward
        if ($started && !$this->flashMoved) {
            $this->moveFlash();
        }

        // done
        return $started;
    }
941817
public function getStatus() : ?int 
    {
        if ( ! $this->hasStatus()) {
            $this->setStatus($this->getDefaultStatus());
        }
        return $this->status;
    }
1232878
public function GetActiveValue()
    {
        $iValue = $this->aActiveFilterData;
        if (is_null($iValue) || ('0' != $iValue && '1' != $iValue)) {
            $iValue = '';
        }

        return $iValue;
    }
638094
public function getRank() : ?float 
    {
        if ( ! $this->hasRank()) {
            $this->setRank($this->getDefaultRank());
        }
        return $this->rank;
    }