firstInitialization( renderObject ) {

		const hasInitialized = this.renderObjects.has( renderObject );

		if ( hasInitialized === false ) {

			this.getRenderObjectData( renderObject );

			return true;

		}

		return false;

	}
Returns `true` if the given render object is verified for the first time of this observer.

@param {RenderObject} renderObject - The render object.
@return {boolean} Whether the given render object is verified for the first time of this observer.