t() :: %SlackWebAPI.Model.ObjsIcon{ image_102: String.t() | nil, image_132: String.t() | nil, image_230: String.t() | nil, image_34: String.t() | nil, image_44: String.t() | nil, image_68: String.t() | nil, image_88: String.t() | nil, image_default: boolean() | nil }