class Liquid::BlankFileSystem

This will parse the template with a LocalFileSystem implementation rooted at ‘template_path’.
liquid = Liquid::Template.parse(template)
Liquid::Template.file_system = Liquid::LocalFileSystem.new(template_path)
Example:
You can add additional instance variables, arguments, or methods as needed.
path structure, you can provide them as hard-coded inline strings, or any manner that you see fit.
You can implement subclasses that retrieve templates from the database, from the file system using a different
A Liquid file system is a way to let your templates retrieve other templates for use with the include tag.

def read_template_file(_template_path)

Called by Liquid to retrieve a template file 
def read_template_file(_template_path)
  raise FileSystemError, "This liquid context does not allow includes."
end