View()ing gtables

The function View() seems to have problems when applied to objects of class "gtable". Example:

g <- ggplot2::ggplotGrob(
  ggplot2::ggplot(mtcars) + ggplot2::geom_point(aes(cyl, disp)))

Error message: Error in names[[i]] : subscript out of bounds

Potentially, this is related to the fact that the class has overwritten the length-function:

length(g)  # gives 18
length(unclass(g)) # gives 12

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