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    dockedItems: [{
        xtype: 'toolbar',
        dock: 'bottom',
        ui: 'footer',
        items: [
            '->',
            {
                xtype: 'button',
                locales: {
                    text: 'locales.guardar'
                },
                action: 'guardarMedicion',
                itemId: 'btnGuardarMedicion'
            }
        ]
    }]