wxCHECK_MSG(columnPtr != NULL, false,"Column pointer must not be NULL.");
wxCHECK_MSG(columnPtr->GetRenderer() != NULL, false,"Column does not have a renderer.");
wxCHECK_MSG(GetModel() != NULL, false,"No model associated with control.");
wxCHECK_MSG(columnPtr != NULL, false,"Column pointer must not be NULL.");
wxCHECK_MSG(columnPtr->GetRenderer() != NULL, false,"Column does not have a renderer.");
wxCHECK_MSG(GetModel() != NULL, false,"No model associated with control.");