interface Tooltipable : FlowContent {
    fun Tag.withTooltip(block: FlowContent.() -> Unit)
    fun Tag.tooltipBox(content: FlowContent.() -> Unit) {
        (this@tooltipBox).withTooltip{
            div(classes = "tooltip-box",block = content)
        }
    }
}

Error:(11, 9) Kotlin: 'fun Tag.withTooltip(block: FlowContent.() -> Unit): Unit' can't be called in this context by implicit receiver. Use the explicit one if necessary

MyClass::class.java.simpleName

com.example.stuff.UtilitiesKt

thing::class.java == ElemBase::class.java

::class

lateinit

lazy

notNull

Show kotlin bytecode -> Decompile

eventBus.unregister

ReadOnlyProperty<in R, out T> where where T : @Component Any

inline

reified

data class

java

interface FooTags {
    fun getTags(): Map<String, Int>
}

class FooTagsRetriever : FooTags {
    override fun getTags(): Map<String, Int> {
        //Get Tags via HTTP
    }
}

class FooTagsCache(private val retriever: FooTags): FooTags {
    private lateinit var tagCache: Map<String, Int>

    override fun getTags(): Map<String, Int> {
        If(!::tagCache.isInitialized) {
            tagCache = retriever.getTags())
        }
        
       return tagCache
}

collections
.filter { it.conditionA }
.filter { it.conditionB }
.filter { it.conditionC }

collections
.filter { it.conditionA || it.conditionB || it.conditionC }