This method is deprecated or moved on the latest stable version.
The last existing version (v1_9_2_180) is shown here.
display_title()
public
Display the new title
according to the editor’s current state.
# File ext/json/lib/json/editor.rb, line 1163
def display_title
title = TITLE.dup
title << ": #@filename" if @filename
title << " *" if @changed
self.title = title
end