grid.echo method for meme object
# S3 method for meme
grid.echo(x = NULL, newpage = TRUE, prefix = NULL)meme object
not use in this method
not use in this method
meme object
using the solution <https://stackoverflow.com/a/18551959/3844636> to not importing grid.echo generics from gridGraphics for easy installation, since gridGraphics has system requirement of ImageMagick <https://github.com/cran/gridGraphics/blob/master/DESCRIPTION#L14>.
this method is just a hack for making cowplot to support meme object, and not used elsewhere.