!React.createElement

const React = {
    createElement: (type, config, ...children) => {
        const key = config ? (config.key || null) : null;
        const props = config || {};
        
        if (children.length === 1) {
            props.children = children[0];
        } else {
            props.children = children;
        }
        
        return {
            type,
            key,
            props
        };
    }
};

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!React.createElement

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