@react.input
    def placeholder_text(v=''):
        return str(v)
Test if saving a visualization and restoring it works.
dataset/ETHPy150Open zoofIO/flexx/flexx/ui/widgets/_lineedit.py/LineEdit.placeholder_text--crossover with--dataset/ETHPy150Open enthought/mayavi/mayavi/tests/test_plot3d_mb_reader.py/TestPlot3dMbReader.test_save_and_restore