function set( height ) {
	/* eslint-disable no-invalid-this */
	if ( !isPositiveNumber( height ) ) {
		throw new TypeError( format( 'invalid assignment. `%s` must be a positive number. Value: `%s`.', 'height', height ) );
	}
	if ( height !== this._height ) {
		debug( 'Current value: %d.', this._height );

		this._height = height;
		debug( 'New Value: %d.', this._height );

		this.emit( 'change' );
	}
}
Sets the height.

@private
@param {PositiveNumber} height - height
@throws {TypeError} must be a positive number