const panes = [
            {
                menuItem: 'Record 1',
                render: () => <Tab.Pane>Tab 1 Content</Tab.Pane>
            }
        ]
...
<Tab panes={panes}/>

getPanes() {
        return this
            .state
            .source
            .map((source) => [{
                menuItem: source.sourceName,
                render: () => <Tab.Pane>Tab 1 Content</Tab.Pane>
            }])
    }
...
<Tab panes={this.getPanes}/>

Warning: Failed prop type: Invalid prop `panes` of type `function` supplied to `Tab`, expected an array.

getPanes() {
    return this
        .state
        .source
        .map((source) => ({
            menuItem: source.sourceName,
            render: () => <Tab.Pane>Tab 1 Content</Tab.Pane>
        }));
}