Hi, in Grav CMS I am used to access page header variables via twig from anywhere.

For example, if I have the following in my markdown page header:

title: 'MYTITLE'
process:
    markdown: true
    twig: true
twig_first: true
foo:
    bar: 'foobar'

Then I can use it anywhere on the markdown page and for example in the CustomHTML particle (with activated twig processing).

{{ page.title }}
Results in MYTITLE

{{ page.header.foo.bar }}
Results in foobar.

How can I access those variable values from within Joomlead Gantry Particles?

Background is: I want to create an outline and assign it to multiple markdown pages. My intention is to define variables per page (e.g. different telefon numbers) and then use these variables from within the particle config. So I have exactly one outline displaying different pages based on their variables in the markdown page header.