How to find where the material derivative is defined

[YXY101676]

Dears
In the following code, many material derivatives such as _dLdop and _dLdarg[i] are called. I cannot find definition of declarePropertyDerivative in GBEvolution or GBEvolutionbase.

registerMooseObject("PhaseFieldApp", ACInterface);
InputParameters
ACInterface::validParams()
{
  InputParameters params = JvarMapKernelInterface<Kernel>::validParams();
  params.addClassDescription("Gradient energy Allen-Cahn Kernel");
  params.addParam<MaterialPropertyName>("mob_name", "L", "The mobility used with the kernel");
  params.addParam<MaterialPropertyName>("kappa_name", "kappa_op", "The kappa used with the kernel");
  params.addParam<bool>("variable_L",
                        true,
                        "The mobility is a function of any MOOSE variable (if "
                        "this is set to false L must be constant over the "
                        "entire domain!)");
  return params;
}

ACInterface::ACInterface(const InputParameters & parameters)
  : DerivativeMaterialInterface<JvarMapKernelInterface<Kernel>>(parameters),
    _L(getMaterialProperty<Real>("mob_name")),
    _kappa(getMaterialProperty<Real>("kappa_name")),
    _variable_L(getParam<bool>("variable_L")),
    _dLdop(getMaterialPropertyDerivative<Real>("mob_name", _var.name())),
    _d2Ldop2(getMaterialPropertyDerivative<Real>("mob_name", _var.name(), _var.name())),
    _dkappadop(getMaterialPropertyDerivative<Real>("kappa_name", _var.name())),

_dLdarg[i] = &getMaterialPropertyDerivative<Real>("mob_name", i);

GBEvolution is the main computational item in materials.

[GiudGiud]

Hello

The declarePropertyDerivative are part of the DerivativeMaterialInterface base class.
It is a template for making these properties, that we instantiate here with the JvarMapKernelInterface<Kernel> class (itself a template instantiation)

Guillaume

[YXY101676]

I can only find the relevant calls for _dLdop(getMaterialPropertyDerivative("mob_name", _var())) in ACBulk.h, but I cannot find the relevant content for _dLdop(declareMaterialPropertyDerivative("mob", _var.name())).The same situation occurs in ACInterface.C.

[YXY101676]

All related material calculations are in GBEvolution.C, and I couldn't find any.

[GiudGiud]

if you find a simulation in the repository that uses this property, use Debug/show_material_props=true to see which Material declares it

[YXY101676]

The kernel ACinterface exists, but the material property _dLdop is not displayed. What's the situation?

[GiudGiud]

dLdop is most likely created by the material creating L