new("big.matrix.descriptor", description = list(sharedType = "FileBacked", 
    filename = "demo.geno.bin", dirname = "./", totalRows = 10L, 
    totalCols = 100L, rowOffset = c(0, 10), colOffset = c(0, 
    100), nrow = 10, ncol = 100, rowNames = NULL, colNames = NULL, 
    type = "char", separated = FALSE))
