fileType property
Restricts results to files of a specified extension.
Filetypes supported by Google include: * Adobe Portable Document Format
(pdf) * Adobe PostScript (ps) * Lotus 1-2-3 (wk1, wk2, wk3,
wk4, wk5, wki, wks, wku) * Lotus WordPro (lwp) * Macwrite
(mw) * Microsoft Excel (xls) * Microsoft PowerPoint (ppt) *
Microsoft Word (doc) * Microsoft Works (wks, wps, wdb) * Microsoft
Write (wri) * Rich Text Format (rtf) * Shockwave Flash (swf) * Text
(ans, txt). Additional filetypes may be added in the future. An
up-to-date list can always be found in Google's
file type FAQ.
Implementation
core.String? fileType;