custom-face-attributes-get
custom-face-attributes-get is a compiled Lisp function in `cus-face.el
'.
(custom-face-attributes-get FACE FRAME)
For FACE on FRAME, return an alternating list describing its attributes.
The list has the form (KEYWORD VALUE KEYWORD VALUE...).
Each keyword should be listed in `custom-face-attributes'.
If FRAME is nil, use the global defaults for FACE.