Function createCollection

Create a collection to store json documents and you can specify the index to accelerate query speed

const index1:Index = {
   path:'/city', // a top level field name 'city' and the path will be '/city'
   indexType: IndexType.StringKey
}
const {collection, result} = await createCollection(db, "test_collection", [index1])
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current all supported index types are 'IndexType.Uniquekey' , 'IndexType.StringKey', 'IndexType.Int64key' and 'IndexType.Doublekey'