hoosiertransfer-mod-saigevers/desktopRuntime/resources/assets/minecraft/models/block/piston_head_sticky.json

{
    "parent": "block/piston_head",
    "textures": {
        "unsticky": "blocks/piston_top_normal",
        "side": "blocks/piston_side",
        "platform": "blocks/piston_top_sticky"
    }
}