function set( padding ) {
	/* eslint-disable no-invalid-this */
	if ( !isNonNegativeInteger( padding ) ) {
		throw new TypeError( format( 'invalid assignment. `%s` must be a nonnegative integer. Value: `%s`.', 'paddingBottom', padding ) );
	}
	if ( padding !== this._paddingBottom ) {
		debug( 'Current value: %d.', this._paddingBottom );

		this._paddingBottom = padding;
		debug( 'New value: %d.', this._paddingBottom );

		this.emit( 'change' );
	}
}
Sets the bottom padding.

@private
@param {NonNegativeInteger} padding - padding
@throws {TypeError} must be a nonnegative integer