Simple Realm Kotlin query builder

Example.kt

val query: RealmQuery<Model> = ...
query.build {
  group {
    equalTo(linkedField(Column.PARAMS, Column.FIELD_TYPE), DCParamModel.FieldType.BOOLEAN)
    and
    equalTo(linkedField(Column.PARAMS, Column.KEY), DCParamObject.FAVORITE)
    and
    equalTo(linkedField(Column.PARAMS, Column.F_BOOL), true)
  }
}
------
//It is equal to this:
query
  .beginGroup()
  .equalTo("${Column.PARAMS}.${Column.FIELD_TYPE}", DCParamModel.FieldType.BOOLEAN)
  .equalTo("${Column.PARAMS}.${Column.KEY}", DCParamObject.FAVORITE)
  .equalTo("${Column.PARAMS}.${Column.F_BOOL}", true)
  .endGroup()

RealmQueryKt.kt

fun <T> buildQuery(query: RealmQuery<T>, build: RealmQuery<T>.() -> Unit): RealmQuery<T> {
  query.build()
  return query
}

fun <T> RealmQuery<T>.build(build: RealmQuery<T>.() -> Unit): RealmQuery<T> {
  return buildQuery(this, build)
}

fun <T> RealmQuery<T>.group(build: RealmQuery<T>.() -> Unit) {
  beginGroup()
  build()
  endGroup()
}

fun <T> RealmQuery<T>.not(build: RealmQuery<T>.() -> Unit) {
  beginGroup()
  not()
  build()
  endGroup()
}

fun <T> RealmQuery<T>.linkedField(vararg fieldNames: String): String {
  return RealmUtil.getField(*fieldNames)
}

val <T> RealmQuery<T>.or: Unit
  get() {
    or()
  }

val <T> RealmQuery<T>.and: Unit
  get() {
    and()
  }

infix fun <T> RealmQuery<T>.or(first: Any) {
  or()
}

infix fun <T> RealmQuery<T>.and(first: Any) {
  and()
}

infix fun <T> RealmQuery<T>.not(first: Any) {
  not()
}