public static Fd create(String name, SegmentMeta sectionInfo, ByteBufferReader.Opener dataSource) {
            return new Fd(name, sectionInfo, dataSource);
        }
Create an {@link IntegratedSegment} with the {@link SegmentMeta} already provided.

@param name        The name of segment.
@param sectionInfo The section info.
@param dataSource  The file where segment resides.
@return A {@link Fd} pointed to the file.
indexr-segment/src/main/java/io/indexr/segment/storage/itg/IntegratedSegment.java