function Padding2d( config ) {

	// "Padding2d" inherits from abstract layer "NativeLayer3d".

	NativeLayer3d.call( this, config );

	/**
	 * padding parameters.
	 *
	 * @type { int }
	 */

	this.paddingWidth = undefined;
	this.paddingHeight = undefined;
	this.paddingLeft = undefined;
	this.paddingRight = undefined;
	this.paddingTop = undefined;
	this.paddingBottom = undefined;

	/**
	 * Actual content parameters.
	 *
	 * @type { int }
	 */

	this.contentWidth = undefined;
	this.contentHeight = undefined;

	this.layerType = "Padding2d";

}
Zero-padding layer for previous 2D input layer and 3D intermediate layer.

@param config, user's configuration for Padding2d layer
@constructor