## S3 method for class 'mlwinfitIGLS,ANY,ANY,ANY':
[(x, i, j, drop)
## S3 method for class 'mlwinfitIGLS,ANY,ANY,ANY':
[(x, i, j) <- value
## S3 method for class 'mlwinfitIGLS':
[[(x, i, j, drop)
## S3 method for class 'mlwinfitIGLS':
[[(x, i, j) <- value
[
and [[
, these are character
.