public function testV1WithPrefix() {
$formatter = new LogstashFormatter( 'app', 'system', null, 'ctx_', LogstashFormatter::V1 );
$record = [ 'extra' => [ 'url' => 1 ], 'context' => [ 'url' => 2 ] ];
public function testV1WithPrefix() {
$formatter = new LogstashFormatter( 'app', 'system', null, 'ctx_', LogstashFormatter::V1 );
$record = [ 'extra' => [ 'url' => 1 ], 'context' => [ 'url' => 2 ] ];