"length"(x)
"names"(x)
"names"(x) <- value
"unique"(x)
"+"(e1, e2)
"+"(e1, e2)
"[["(x, i)
"as.matrix"(x, col)
"sample"(x, size)
"as.bundle"(object, ...)
"as.bundle"(object)
"as.sparseMatrix"(x, col)
objects
"list"
pAttribute
"character"