operator fun <V> MutableMap<in String, in V>.setValue( thisRef: Any?, property: KProperty<*>, value: V)
Stores the value of the property for the given object in this mutable map.
thisRef - the object for which the value is requested (not used).
property - the metadata for the property, used to get the name of property and store the value associated with that name in the map.
value - the value to set.
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Licensed under the Apache License, Version 2.0.
https://kotlinlang.org/api/latest/jvm/stdlib/kotlin.collections/set-value.html