S4 assignment \alias and \usage

What is the Rd file alias and usage syntax for an S4 assignment method? 
   I have been trying variations on

\alias{TSdoc<-,default-method}

\usage{
     \S4method{TSdoc}{default}(x) <- value

but so far I have not got it right according to various codoc, etc, checks.

Paul Gilbert
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La version fran?aise suit le texte anglais.

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