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/** Set the View visibility to VISIBLE and eventually animate the View alpha till 100% */
fun View.visible(animate: Boolean = true) {
    if (animate) {
        animate().alpha(1f).setDuration(300).setListener(object : AnimatorListenerAdapter() {
            override fun onAnimationStart(animation: Animator) {
                super.onAnimationStart(animation)
                visibility = View.VISIBLE
            }
        })
    } else {

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fun View.createSnackbar(text: String,
                        duration: Int = Snackbar.LENGTH_SHORT,
                        actionLabel: String = "Action",
                        dismissOnAction: Boolean = true,
                        action: ((View) -> Unit)? = null): Snackbar {

    val snackbar = Snackbar.make(this, text, duration)
    action?.let {
        snackbar.setAction(actionLabel, {
            action(it)

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@ColorInt fun Context.color(@ColorRes id: Int, theme: Resources.Theme? = getTheme()): Int =
        if (Build.VERSION.SDK_INT >= 23) 
            resources.getColor(id, theme) 
        else 
            resources.getColor(id)

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import android.app.Activity
import android.content.Intent
import android.os.Bundle
import android.support.v7.app.AppCompatActivity

abstract class CompositionActivity : AppCompatActivity() {

    private val onCreateFeatures = mutableListOf<CompositionActivity.OnCreateFeature>()
    private val onStartFeatures = mutableListOf<CompositionActivity.OnStartFeature>()
    private val onResumeFeatures = mutableListOf<CompositionActivity.OnResumeFeature>()

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import io.reactivex.Observable
import io.reactivex.disposables.CompositeDisposable
import io.reactivex.disposables.Disposable
import io.reactivex.observers.DisposableObserver
import io.reactivex.subjects.BehaviorSubject
import io.reactivex.subjects.PublishSubject


interface ViewState

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import java.lang.ref.WeakReference

/**
 * Base Interface for all the presenters.
 *
 * @param T The type of view (which extends [View]) the presenter is controlling.
 */
interface PresenterApi<in T : View> {
    fun onAttach(v: T)
    fun onDetach()

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<TextView
    android:layout_width="0dp"
    android:layout_height="wrap_content"
    android:ellipsize="end"
    android:maxLines="1"/>

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/* --- Log functions with Tag as caller class name --- */

inline fun <reified T: Any> T.logD(text: String) {
    Log.d(T::class.java.simpleName, text)
}

inline fun <reified T: Any> T.logE(text: String) {
    Log.e(T::class.java.simpleName, text)
}

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   /**
     * Custom matcher that checks if a list is equal to expected when elements don't have equals()
     * using {@link ReflectionEquals}.
     */
    public static ArgumentMatcher<List> equalsList(List expectedList) {
        return new ArgumentMatcher<List>() {
            @Override
            public boolean matches(Object argument) {
                List list = (List) argument;
                boolean assertion;

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