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		);

	}

	public function getExternalLB( $cluster ) {

		if ( !isset( $this->extLBs[$cluster] ) ) {

			$this->extLBs[$cluster] = $this->newExternalLB( $cluster );

			$this->getChronologyProtector()->initLB( $this->extLBs[$cluster] );

		}

		return $this->extLBs[$cluster];

	}

	public function getAllMainLBs() {

		$lbs = [];

		return $this->newLoadBalancer( $this->externalClusters[$cluster] );

	}

	public function getExternalLB( $cluster ) {

		if ( !isset( $this->extLBs[$cluster] ) ) {

			$this->extLBs[$cluster] = $this->newExternalLB( $cluster );

			$this->getChronologyProtector()->initLB( $this->extLBs[$cluster] );

		}

		return $this->extLBs[$cluster];

	}

	public function getAllMainLBs() {

		return [ 'DEFAULT' => $this->getMainLB() ];