values:
  - var1: 4
  - a: 5
  - b: 6
  - c: The value of C is 7
  - This value comes from inc2.yaml. x is 3, y is 4
  - From main config, x is 3, y is 2
  - $a $b $c are out of scope here
  - keys_in_inc3:
      x: 3
      y: 2
substitutions:
  x: 3
  y: 2
  include_file: inc1