array name string matching extension

What: array name string matching extension
Where: From the contact
Description: A small extension to tclVar to allow a pattern to be used with the "array names" command. An array used as a 2D-array by having elements of the form: matrix(x,y) could be accessed by: array names matrix "1,*" to return all elements in the first column.
Contact: mailto:[email protected] (Stephen A Uhler)

Is this just a historical artifact? Hasn't every version of Tcl since 7.4 supported array names array ?pattern? (?)