new("big.matrix.descriptor", description = list(sharedType = "FileBacked", 
    filename = "mvp.geno.bin", dirname = "05_mvp/", totalRows = 10L, 
    totalCols = 15L, rowOffset = c(0, 10), colOffset = c(0, 15
    ), nrow = 10, ncol = 15, rowNames = NULL, colNames = NULL, 
    type = "char", separated = FALSE))
