testBlock.js

( function() {
	const { registerBlockType } = wp.blocks;
	const { createElement: el } = wp.element;
	const { InnerBlocks } = wp.editor;

	registerBlockType( 'block/inner-block-transforms', {
		title: 'Test transforms',
		icon: 'carrot',
		category: 'common',

		edit() {
			return el( 'div', { style: { outline: '1px solid gray', padding: 5 } },
				el( InnerBlocks, {
					allowedBlocks: [ 'core/list', 'core/quote' ],
                    template: [
						[ 'core/paragraph' ],
						[ 'core/quote' ],
						[ 'core/heading' ],
                        [ 'core/list' ],
                    ],
                } )
			);
		},

		save() {
			return el( 'div', { style: { outline: '1px solid gray', padding: 5 } },
				el( InnerBlocks.Content )
			);
		},
    } );
} )();