src/ElasticSearch/Bulk.php
public function createPayload() 
	{
		$payloads = array();
		foreach ($this->operations as $operation) {
			foreach ($operation as $partial) {
				$payloads[] = json_encode($partial);
			}
		}
		return join("\n", $payloads)."\n";
	}
public function createPayload() 
	{
		$payloads = array();
		foreach ($this->operations as $operation) {
			foreach ($operation as $partial) {
				$payloads[] = json_encode($partial);
			}
		}
		return join("\n", $payloads)."\n";
	}
create a request payload with all pending operations
@return string