Kotlin react состояние и свойства

Как перенести часть lesson из props в state. Что бы уроки выводились на экран (они записанны в отдельном файле ,первый код)

    package data 

data class Lesson( 
 val name: String 
) 

val lessonsList = arrayOf( 
 Lesson("Lecture"), 
 Lesson("Practice"), 
 Lesson("Exam")

Код где свойства и состояние

package component 

import data.* 
import org.w3c.dom.events.Event 
import react.* 
import react.dom.h1 

interface AppProps : RProps { 
 var lessons: Array<Lesson> 
 var students: Array<Student> 
} 

interface AppState : RState { 
 var presents: Array<Array<Boolean» 
} 

class App : RComponent<AppProps, AppState>() { 
 override fun componentWillMount() { 
 state.presents = Array(props.lessons.size) { 
 Array(props.students.size) { false } 
 } 
 } 

 override fun RBuilder.render() { 
 h1 { +"App" } 
 lessonListFull( 
 props.lessons, 
 props.students, 
 state.presents, 
 onClickLessonFull 
 ) 
 studentListFull( 
 props.lessons, 
 props.students, 
 transform(state.presents), 
 onClickStudentFull 
 ) 
 } 

 fun transform(source: Array<Array<Boolean») = 
 Array(source[0].size){row-> 
 Array(source.size){col -> 
 source[col][row] 
 } 
 } 

 fun onClick(indexLesson: Int, indexStudent: Int) = 
 { _: Event -> 
 setState { 
 presents[indexLesson][indexStudent] = 
 !presents[indexLesson][indexStudent] 
 } 
 } 

 val onClickLessonFull = 
 { indexLesson: Int -> 
 { indexStudent: Int -> 
 onClick(indexLesson, indexStudent) 
 } 
 } 

 val onClickStudentFull = 
 { indexStudent: Int -> 
 { indexLesson: Int -> 
 onClick(indexLesson, indexStudent) 
 } 
 } 

} 

fun RBuilder.app( 
 lessons: Array<Lesson>, 
 students: Array<Student> 
) = child(App::class) { 
 attrs.lessons = lessons 
 attrs.students = students 
}