FILE fqName:<root> fileName:/variableAsFunctionCall.kt
  FUN name:k visibility:public modality:FINAL <> () returnType:kotlin.Function0<kotlin.String> 
    BLOCK_BODY
      RETURN type=kotlin.Nothing from='public final fun k (): kotlin.Function0<kotlin.String> declared in <root>'
        BLOCK type=kotlin.Function1<kotlin.Function0<kotlin.String>, kotlin.Function0<kotlin.String>> origin=LAMBDA
          FUN LOCAL_FUNCTION_FOR_LAMBDA name:<anonymous> visibility:local modality:FINAL <> () returnType:kotlin.Function0<kotlin.String> 
            BLOCK_BODY
              ERROR_CALL 'Unresolved reference: this#' type=kotlin.String
          FUNCTION_REFERENCE 'local final fun <anonymous> (): kotlin.Function0<kotlin.String> declared in <root>.k' type=kotlin.Function1<kotlin.Function0<kotlin.String>, kotlin.Function0<kotlin.String>> origin=LAMBDA
  FUN name:test1 visibility:public modality:FINAL <> (f:kotlin.Function0<kotlin.Unit>) returnType:kotlin.Unit
    VALUE_PARAMETER name:f index:0 type:kotlin.Function0<kotlin.Unit> 
    BLOCK_BODY
      RETURN type=kotlin.Nothing from='public final fun test1 (f: kotlin.Function0<kotlin.Unit>): kotlin.Unit declared in <root>'
        CALL 'public abstract fun invoke (): kotlin.Unit declared in kotlin.Function0' type=kotlin.Unit origin=null
          $this: GET_VAR 'f: kotlin.Function0<kotlin.Unit> declared in <root>.test1' type=kotlin.Function0<kotlin.Unit> origin=null
  FUN name:test2 visibility:public modality:FINAL <> (f:kotlin.Function1<kotlin.String, kotlin.Unit>) returnType:IrErrorType 
    VALUE_PARAMETER name:f index:0 type:kotlin.Function1<kotlin.String, kotlin.Unit> 
    BLOCK_BODY
      RETURN type=kotlin.Nothing from='public final fun test2 (f: kotlin.Function1<kotlin.String, kotlin.Unit>): IrErrorType declared in <root>'
        ERROR_CALL 'Unresolved reference: <Unresolved name: f>#' type=IrErrorType
  FUN name:test3 visibility:public modality:FINAL <> () returnType:IrErrorType 
    BLOCK_BODY
      RETURN type=kotlin.Nothing from='public final fun test3 (): IrErrorType declared in <root>'
        ERROR_CALL 'Unresolved reference: <Unresolved name: invoke>#' type=IrErrorType
          CALL 'public final fun k (): kotlin.Function0<kotlin.String> declared in <root>' type=kotlin.Function0<kotlin.String> origin=null
  FUN name:test4 visibility:public modality:FINAL <> (ns:kotlin.String?) returnType:kotlin.String
    VALUE_PARAMETER name:ns index:0 type:kotlin.String? 
    BLOCK_BODY
      RETURN type=kotlin.Nothing from='public final fun test4 (ns: kotlin.String?): kotlin.String declared in <root>'
        CALL 'public abstract fun invoke (): kotlin.String declared in kotlin.Function0' type=kotlin.String origin=null
          $this: CALL 'public final fun k (): kotlin.Function0<kotlin.String> declared in <root>' type=kotlin.Function0<kotlin.String> origin=null