question: returns a derivative evaluator declaration for this variable realization . none concode_field_sep String varName concode_elem_sep String fidelityName concode_elem_sep Differentiation differentiation concode_elem_sep long serialVersionUID concode_elem_sep String gradientName concode_elem_sep String filterName concode_elem_sep Wrt wrt concode_elem_sep String evalutorName concode_field_sep void setName concode_elem_sep String getVarName concode_elem_sep String getName concode_elem_sep Wrt getWrt concode_elem_sep String getGradientName concode_elem_sep String getFilterName concode_elem_sep String getEvaluatorName concode_elem_sep void setGradientName concode_elem_sep void setFilterName concode_elem_sep void setWrt concode_elem_sep void setWrt concode_elem_sep void setEvaluatorName concode_elem_sep String toString concode_elem_sep void setDifferentiation concode_elem_sep void setVarName
target: Differentiation function ( ) { return differentiation ; }