+
+/*! Returns the feature error generated according to feature error and exec state
+ * \param theFeature a feature
+ * \return error value or empty string
+ */
+MODELAPI_EXPORT std::string getFeatureError(const FeaturePtr& theFeature);
+
+/*!
+ * Searches for variable with name \param theName in \param theDocument.
+ * If found, set it value in the \param outValue and returns true.
+ */
+MODELAPI_EXPORT bool findVariable(const DocumentPtr& theDocument,
+ const std::string& theName, double& outValue, ResultParameterPtr& theParam);
+
+/*!
+ * Searches for variable with name \param theName in the active document (Part), when
+ * in the root document (PartSet). If found, set it value in the \param outValue
+ * and returns true. If \param theDocument is empty active document is used.
+ */
+MODELAPI_EXPORT bool findVariable(const std::string& theName, double& outValue, ResultParameterPtr& theParam,
+ const DocumentPtr& theDocument = DocumentPtr());
+
+/*!
+ * Returns the values of the next random color. The values are in range [0, 255]
+ * \param theValues a container of component of RGB value: red, green, blue
+ */
+MODELAPI_EXPORT void findRandomColor(std::vector<int>& theValues);
+
+/*!
+ * Searches for Part result that contains the reference to the given document.
+ * The result must be presented in the tree.
+ * \param theMain document that contains the searched feature
+ * \param theSub document that is searched, the resulting feature references to it
+ * \returns null if not found
+ */
+MODELAPI_EXPORT ResultPtr findPartResult(const DocumentPtr& theMain, const DocumentPtr& theSub);
+
+/*!
+ * Searches for Part the feature that contains in result the reference to the given document.
+ * The result may be disabled.
+ * \param theMain document that contains the searched feature
+ * \param theSub document that is searched, the resulting feature references to it
+ * \returns null if not found
+ */
+MODELAPI_EXPORT FeaturePtr findPartFeature(const DocumentPtr& theMain, const DocumentPtr& theSub);
+
+/*!
+ * Returns the composite feature - parent of this feature.
+ * \param theFeature the sub-element of composite
+ * \returns null if it is not sub-element of composite
+ */
+MODELAPI_EXPORT CompositeFeaturePtr compositeOwner(const FeaturePtr& theFeature);
+
+/*!
+ * Returns the compsolid result - parent of this result.
+ * \param theSub the sub-element of comp-solid
+ * \returns null if it is not sub-element of composite
+ */
+MODELAPI_EXPORT ResultCompSolidPtr compSolidOwner(const ResultPtr& theSub);
+
+/*!
+* Returns true if the result contains a not empty list of sub results. It processes result compsolid.
+* \param theResult a result object
+* \returns boolean value
+*/
+MODELAPI_EXPORT bool hasSubResults(const ResultPtr& theResult);
+
+/*!
+* Adds the results of the given feature to theResults list: including disabled and sub-results
+*/
+MODELAPI_EXPORT void allResults(const FeaturePtr& theFeature, std::list<ResultPtr>& theResults);
+