KtCallExpression(75,78): 'f()'
  KaApplicableCallCandidate:
    candidate = KaImplicitInvokeCall:
      contextArgumentMapping = {}
      contextArguments = []
      dispatchReceiver = KaExplicitReceiverValue:
        expression = f
        isSafeNavigation = false
        type = Foo
      extensionReceiver = null
      signature = KaFunctionSignature:
        receiverType = null
        returnType = kotlin.Unit
        symbol = /Foo.invoke(<dispatch receiver>: Foo, vararg a: kotlin.Any): kotlin.Unit
        valueParameters = [
          KaVariableSignature:
            name = a
            receiverType = null
            returnType = kotlin.Any
            symbol = vararg a: kotlin.Any
            contextParameters = []
            callableId = null
        ]
        contextParameters = []
        callableId = /Foo.invoke
      typeArgumentsMapping = {}
      valueArgumentMapping = {}
    isInBestCandidates = true