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Imagick::writeImagesFile — Writes frames to a filehandle
$format] ) : bool
Writes all image frames into an open filehandle. This method can be used to write animated gifs or other multiframe images into open filehandle. This method is available if Imagick has been compiled against ImageMagick version 6.3.6 or newer.
Filehandle where to write the images
TRUE on success.