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-@defvar mime-viewer/content-header-filter-alist
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-@deffn{Function} mime-viewer/default-content-header-filter
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-@node content-body, content-separator, content-header, Preview Buffer
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-¤¢¤ë content ¤Î content-body ¤¬É½¼¨¤µ¤ì¤ë»þ¡¢preview buffer ¤Ë¤Ï
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-@deffn{Function} mime-viewer/body-visible-p cnum cinfo &optional ctype
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-@defvar mime-viewer/content-filter-alist
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-@deffn{Function} mime-viewer/default-content-filter cnum cinfo ctype params subj
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