Modding Help disable tram platform passthrough

hello i am currently trying to edit the stationtram object so that npcs and players cannot drop down through it.
there doesn't seem to be any documentation on the json keys but basically i need to know what the keys are for "collisionKind" and /orif there are any ways of disabling pass through for platforms.

Code:

  "movementSettings" : {
    "collisionPoly" : [ [-2.5, 3.75], [2.5, 3.75], [2.5, 0.5], [1.5, -0.25], [-1.5, -0.25], [-2.5, 0.5] ],
    "mass" : 2.0,
    "ignorePlatformCollision" : true,
    "physicsEffectCategories" : []
  },

  "loungePositions" : {
    "seat" : {
      "part" : "gate",
      "partAnchor" : "standPosition",
      "orientation" : "stand"
    }
  },

  "physicsCollisions" : {
    "platform" : {
      "collision" : [ [-2.5, 0.5], [2.5, 0.5] ],
      "collisionKind" : "platform"
    }
  },

 

Just off the top of my head I think this might work.

Code:

"collisionKind" : "solid"

 

tired that but it turns the item into perfectly generic item