"Generation:" items that include emission on certain elements of the model wont be emissive

For custom minecraft model jsons (items or helmets) you can add emission to certain parts of the model. Example of an "element" with emission ("light_emission": 15)

{
    "name": "light"
    "from": [7, 2, 3],
    "to": [9, 4, 3],
    "light_emission": 15,
    "rotation": {"angle": 0, "axis": "y", "origin": [7, 1, 2],
    "faces": {
        "north": {"uv": [10, 1, 11, 2], "texture": "#0"},
        "east": {"uv": [16, 0, 16, 1], "texture": "#0"},
        "south": {"uv": [10, 0, 11, 1], "texture": "#0"},
        "west": {"uv": [16, 0, 16, 1], "texture": "#0"},
        "up": {"uv": [16, 0, 15, 0], "texture": "#0"},
        "down": {"uv": [16, 0, 15, 0], "texture": "#0"}
}

What i would like to see is something in the direction of:

myEmissionLight:
    Material: PAPER
    Display: 'my cool item with emission'
    Generation:
        Model: whatever/model_with_a_emission_part
        EmissionParts:
            - 'light' 15

Where in this case any cubes or "elements" with the name "light" would get emission with a value of 15 added to their "element" in the resulting json.