@Override
    @edu.umd.cs.findbugs.annotations.SuppressWarnings(value = "NP_NONNULL_PARAM_VIOLATION",
        justification = "https://github.com/findbugsproject/findbugs/issues/79")
    public void onComplete() {
      future.complete(null);
    }
Performs a scan of META table for given table.
@param metaTable scanner over meta table
@param startRow  Where to start the scan
@param stopRow   Where to stop the scan
@param type      scanned part of meta
@param maxRows   maximum rows to return
@param visitor   Visitor invoked against each row
hbase-client/src/main/java/org/apache/hadoop/hbase/ClientMetaTableAccessor.java