kotlin.Result

The rationale behind these limitations is that future versions of Kotlin may expand and/or change semantics of functions that return Result type and null-safety operators may change their semantics when used on values of Result type. In order to avoid breaking existing code in the future releases of Kotin and leave door open for those changes, the corresponding uses produce an error now. Exceptions to this rule are made for carefully-reviewed declarations in the standard library that are part of the Result type API itself.

Result<T> is implemented by an inline class and is optimized for a successful case. Success is stored as a value of type T directly, without additional boxing, while failure exception is wrapped into an internal Result.Failure class that is not exposed through binary interface and may be changed later.

JSON

Cannot access class 'kotlinx.serialization.json.JSON'. Check your module classpath for missing or conflicting dependencies

+--- com.github.kittinunf.fuel:fuel-kotlinx-serialization:2.0.0
|    +--- org.jetbrains.kotlin:kotlin-stdlib:1.3.20 (*)
|    +--- com.github.kittinunf.fuel:fuel:2.0.0 (*)
|    \--- org.jetbrains.kotlinx:kotlinx-serialization-runtime:0.9.1 -> 0.10.0 (*)

and does Fuel have anything that automatically handles caching files using ETag values ? (edited)

can someone remind me whats the difference between httpDownload and httpGet ?