private function _getKeyIdMap(): array
    {
        // lazily build mapping
        if (!isset($this->_keyIdMap)) {
            $this->_keyIdMap = array();
            foreach ($this->_certs as $cert) {
                $id = self::_getCertKeyId($cert);
                if (!isset($this->_keyIdMap[$id])) {
                    $this->_keyIdMap[$id] = array();
                }
                array_push($this->_keyIdMap[$id], $cert);
            }
        }
        return $this->_keyIdMap;
    }
private function _getKeyIdMap(): array
    {
        // lazily build mapping
        if (!isset($this->_keyIdMap)) {
            $this->_keyIdMap = array();
            foreach ($this->_certs as $cert) {
                $id = self::_getCertKeyId($cert);
                if (!isset($this->_keyIdMap[$id])) {
                    $this->_keyIdMap[$id] = array();
                }
                array_push($this->_keyIdMap[$id], $cert);
            }
        }
        return $this->_keyIdMap;
    }
private function _getKeyIdMap ( ) : array { // lazily build mapping if ( ! isset ( $ this -> _keyIdMap ) ) { $ this -> _keyIdMap = array ( ) ; foreach ( $ this -> _certs as $ cert ) { $ id = self :: _getCertKeyId ( $ cert ) ; if ( ! isset ( $ this -> _keyIdMap [ $ id ] ) ) { $ this -> _keyIdMap [ $ id ] = array ( ) ; } array_push ( $ this -> _keyIdMap [ $ id ] , $ cert ) ; } } return $ this -> _keyIdMap ; }
Get certificate mapping by public key id.

@return (Certificate[])[]
Get certificate mapping by public key id .