$query public property The query object associated with this batch

selectFileCollection() protected method Selects GridFS

$batchSize public property The number of rows to be returned in

explain() public method Return an explanation of the query

removeMigrationHistory() protected method Removes existing

$enableCaching public property Whether to enable caching translated

buildBetweenCondition() public method Creates an Mongo

current() public method Returns the current dataset.

init() public method Initializes the migration.

getDb() public static method Returns the Mongo connection