Return 'true' if the source contains an animated HEIF image sequence. The source is not consumed.
Return 'true' if the source contains an animated WebP image. The source is not consumed.
Return 'true' if the source contains a GIF image. The source is not consumed.
Return 'true' if the source contains an HEIF image. The source is not consumed.
Return 'true' if the source contains a WebP image. The source is not consumed.