@top
The @top command is a special sectioning command that you use
only after an @node Top line at the beginning of a Texinfo file.
The @top command tells the makeinfo formatter
which node is the `Top'
node. It has the same typesetting effect as @unnumbered
(see section @unnumbered, @appendix).
For detailed information, see
section The @top Sectioning Command.
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