/**
     * Process is currently in the queue.
     * @type {string}
     * @name jibo.face.views.ViewProcess#QUEUED
     * @readOnly
     */

    /**
     * Process has been started.
     * @type {string}
     * @name jibo.face.views.ViewProcess#STARTED
     * @readOnly
     */

    /**
     * Process has successfully completed.
     * @type {string}
     * @name jibo.face.views.ViewProcess#COMPLETED
     * @readOnly
     */

    /**
     * Process was interrupted by another process.
     * @type {string}
     * @name jibo.face.views.ViewProcess#INTERRUPTED
     * @readOnly
     */

    /**
     * Process failed.
     * @type {string}
     * @name jibo.face.views.ViewProcess#FAILED
     * @readOnly
     */

    /**
     * Get flag to determine if views currently in process.
     * If a new process is requested while active the active process will be interrupted.applied.
     * @name jibo.face.views.ViewProcess#active
     * @type {Boolean}
     * @readOnly
     */

    /**
     * Options for current view change.
     * @name jibo.face.views.ViewProcess#changeOptions
     * @type {jibo.face.views~ChangeOptions}
     */

    /**
     * Callback for process completes.
     * @name jibo.face.views.ViewProcess#_onComplete
     * @type {jibo.face.views~ViewCallback}
     */

    /**
     * Callback for process fails, due to error or interruption.
     * @name jibo.face.views.ViewProcess#onFailure
     * @type {Function}
     */

    /**
     * Callback for when next view in process has loaded.
     * Use to access view prior to it being added to display and opened.
     * @name jibo.face.views.ViewProcess#onLoaded
     * @type {jibo.face.views~ViewCallback}
     */

    /**
     * Queue of view change processes.
     * @name jibo.face.views.ViewProcess#processQueue
     * @type {jibo.face.views.ViewProcess[]}
     */

    /**
     * Current state of process.
     * @name jibo.face.views.ViewProcess#status
     * @type {String}
     */

    /**
     * Flag to determine if views currently in process.
     * If a new process is requested while active the active process will be interrupted.
     * @name jibo.face.views.ViewProcess#_active
     * @type {Function}
     * @private
     */

    /**
     * Array of Views involved in the current process.
     * A reference is kept so that views can be destroyed if process is interrupted.
     * @name jibo.face.views.ViewProcess#_activeViews
     * @type {Array<jibo.face.views.View>}
     * @private
     */

    /**
     * Currently active view in display.
     * @name jibo.face.views.ViewProcess#_currentView
     * @type {jibo.face.views.View}
     * @private
     */

    /**
     * Currently active view in display.
     * @name jibo.face.views.ViewProcess#currentView
     * @type {jibo.face.views.View}
     */

    /**
     * View that was previously current but is now in process of closing.
     * @name jibo.face.views.ViewProcess#_closingView
     * @type {jibo.face.views.View}
     * @private
     */

    /**
     * View that was previously current but is now in process of closing.
     * @name jibo.face.views.ViewProcess#closingView
     * @type {jibo.face.views.View}
     */

    /**
     * Flag for process interruption, if 'true' process has been interrupted.
     * @name jibo.face.views.ViewProcess#_interrupted
     * @type {boolean}
     * @private
     */

    /**
     * Flag for process interruption, if 'true' process has been interrupted.
     * @name jibo.face.views.ViewProcess#interrupted
     * @type {boolean}
     * @readOnly
     */

    /**
     * Prepare change options for logging
     * @method jibo.face.views.ViewProcess#serializeOptions
     * @param {jibo.face.views~ChangeOptions} changeOptions - Options for the change view process being queued.
     * @public
     */

    /**
     * Start the view process.
     * Before starting a process should check for interrupt.
     * @method jibo.face.views.ViewProcess#start
     * @param {jibo.face.views~ViewCallback} onComplete Callback for process completes.
     * @param {Function} onFailure Callback for process fails, due to error or interruption.
     * @param {jibo.face.views~ViewCallback} onLoaded - Callback for when next view in process has loaded.
     * @param {jibo.face.views~ChangeOptions} changeOptions - Options for the change view process being queued.
     */

    /**
     * Adds View to Array of Views involved in the current process.
     * A reference is kept so that views can be destroyed if process is interrupted.
     * @method jibo.face.views.ViewProcess#storeView
     * @param {jibo.face.views.View} view View to keep reference to for current process.
     */

    /**
     * Call to complete process.
     * Completion callbacks are triggered and process is cleared.
     * @method jibo.face.views.ViewProcess#complete
     * @param {jibo.face.views.View} [view] View established by process, not all processes will return a view.
     */

    /**
     * Fail current process, call appropriate callbacks and clean up.
     * @method jibo.face.views.ViewProcess#fail
     * @param {Boolean} retainCurrent - if `true` prevents currentView from being destroyed.
     */

    /**
     * Check for active process, if active sets the interrupted flag to `true`.
     * @method jibo.face.views.ViewProcess#interrupt
     * @param {jibo.face.views~ChangeOptions} changeOptions - Options for the process being queued. Identifier for interrupting process, useful in debugging.
     * @returns {boolean} `true` if a process is interrupted.
     */

    /**
     * Add a change view process to the queue.
     * @method jibo.face.views.ViewProcess#addProcessToQueue
     * @param {jibo.face.views~ChangeOptions} changeOptions - Options for the process being queued.
     * @param {jibo.face.views~ViewCallback} [onComplete] - Callback if process completes, returns current view as param.
     * @param {Function} [onFailure] - Callback if queued process fails, gets interrupted, or does not get to execute.
     * @param {jibo.face.views~ViewCallback} [onLoaded] Called when next view has loaded, can be used to augment View prior to it being displayed.
     */

    /**
     * Clear the view process references.
     * @method jibo.face.views.ViewProcess#clear
     * @private
     */