$fakeContext = new ResourceLoaderContext( new ResourceLoader, new FauxRequest );

$mOld = new ResourceLoaderSchemaModule( array(
	'class'    => 'ResourceLoaderSchemaModule',
	'schema'   => 'GettingStartedRedirectImpression',
	'revision' => 7350115,
) );

echo 'oldEffective: ' . max( $mOld->getModifiedTime( $fakeContext ), wfTimestamp( TS_UNIX, $wgCacheEpoch ) );

$mNew = new ResourceLoaderSchemaModule( array(
	'class'    => 'ResourceLoaderSchemaModule',
	'schema'   => 'GettingStartedRedirectImpression',
	'revision' => 7355552,
) );

echo 'newEffective: ' . max( $mNew->getModifiedTime( $fakeContext ), wfTimestamp( TS_UNIX, $wgCacheEpoch ) );