lookup

fun lookup(key: String): T?
fun lookup(key: String, allowPartial: Boolean): T?
fun lookup(key: CharArray, allowPartial: Boolean): T?
fun lookup(key: CharArray, keyPos: Int, keyLength: Int, allowPartial: Boolean): T?
fun lookup(key: CharArray, keyPos: Int, keyLength: Int, keyOffset: Int, allowPartial: Boolean): T?