import FreeCAD


def is_object_solid(obj):
    """If obj is solid return True"""
    if not isinstance(obj, FreeCAD.DocumentObject):
        return False

    if not hasattr(obj, 'Shape'):
        return False

    if not hasattr(obj.Shape, 'Solids'):
        return False

    if len(obj.Shape.Solids) == 0:
        return False

    return True