title: example of package 'ggtextures' in R didn't work
body: <p>I tried to use <a href="https://github.com/clauswilke/ggtextures" rel="nofollow noreferrer">ggtextures</a> by <a href="https://stackoverflow.com/users/4975218/claus-wilke">@Claus Wilke</a> to create a barplot fill with different line style. But the example <a href="https://github.com/clauswilke/ggtextures" rel="nofollow noreferrer">here</a> didn't work.</p>
  <p>for example:</p>
  <pre><code>devtools::install_github(&quot;clauswilke/ggtextures&quot;)
  
  library(ggtextures)
  library(ggplot2)
  
  images = c(
   compact = &quot;http://www.hypergridbusiness.com/wp-content/uploads/2012/12/rocks2-256.jpg&quot;,
   midsize = &quot;http://www.hypergridbusiness.com/wp-content/uploads/2012/12/stone2-256.jpg&quot;,
   suv = &quot;http://www.hypergridbusiness.com/wp-content/uploads/2012/12/siding1-256.jpg&quot;,
  `2seater` = &quot;http://www.hypergridbusiness.com/wp-content/uploads/2012/12/mulch1-256.jpg&quot;,
   minivan = &quot;http://www.hypergridbusiness.com/wp-content/uploads/2012/12/rocks1-256.jpg&quot;,
   pickup = &quot;http://www.hypergridbusiness.com/wp-content/uploads/2012/12/wood3-256.jpg&quot;,
   subcompact = &quot;http://www.hypergridbusiness.com/wp-content/uploads/2012/12/concrete1-256.jpg&quot;)
  
  ggplot(mpg, aes(class, image = class)) +
    geom_textured_bar() +
    scale_image_manual(values = images)
  </code></pre>
  <p>error shows <code>Error: 'unitType' is not an exported object from 'namespace:grid'</code>.</p>
  <p>Anyone knows what's going on?</p>