open fun addProperty(key: String!, value: String!): Unit
Add property to balloon model.
key
- String!: property
value
- String!: property
open fun addProperty(key: String!, value: Int): Unit
Add int property to balloon model.
key
- String!: property
value
- Int: property
open fun addProperty(key: String!, value: Long): Unit
Add long property to balloon model.
key
- String!: property
value
- Long: property