def __init__(self, object, handler):
        self._object  = object
        self._handler = handler
Set an error *message* in the *parameter*, but only when no error
dataset/ETHPy150Open pyjs/pyjs/examples/showcase/src/uiHelpers.py/CommandWrapper.__init__--crossover with--dataset/ETHPy150Open Esri/solutions-geoprocessing-toolbox/suitability/toolboxes/scripts/MultidimensionSupplementalTools/MultidimensionSupplementalTools/Scripts/mds/tools/tool.py/Tool.set_error