Paradox/pod/Edge.php
public function getFrom()
    {
        if (isset($this->_from)) {
            return $this->_from;
        }

        if (!isset($this->_from) && isset($this->_data['_from'])) {
            $toolbox = $this->_toolbox;

            $driverVertex = $toolbox->getDriver()->getVertex($toolbox->getGraph(), $this->parseIdForKey($this->_data['_from']));

            $this->_from = $toolbox->getPodManager()->convertDriverDocumentToPod($driverVertex);

            return $this->_from;
        }

        return null;
    }
public function getFrom()
    {
        if (isset($this->_from)) {
            return $this->_from;
        }

        if (!isset($this->_from) && isset($this->_data['_from'])) {
            $toolbox = $this->_toolbox;

            $driverVertex = $toolbox->getDriver()->getVertex($toolbox->getGraph(), $this->parseIdForKey($this->_data['_from']));

            $this->_from = $toolbox->getPodManager()->convertDriverDocumentToPod($driverVertex);

            return $this->_from;
        }

        return null;
    }
Get the from vertex. If we do not have the vertex yet (edge was loaded from the server), then fetch it from the server.
@return null|AModel