## Generic-function: SB-GRAY:STREAM-LINE-COLUMN
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> Return the column number where the next character
> will be written, or NIL if that is not meaningful for this stream.
> The first column on a line is numbered 0. This function is used in
> the implementation of PPRINT and the FORMAT ~T directive. For every
> character output stream class that is defined, a method must be
> defined for this function, although it is permissible for it to
> always return NIL.

### Lambda list
```cl
(stream)
```