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diff --git a/extern/mantaflow/helper/pwrapper/pclass.h b/extern/mantaflow/helper/pwrapper/pclass.h
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+/******************************************************************************
+ *
+ * MantaFlow fluid solver framework
+ * Copyright 2011-2014 Tobias Pfaff, Nils Thuerey
+ *
+ * This program is free software, distributed under the terms of the
+ * Apache License, Version 2.0
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Base class for all Python-exposed classes
+ *
+ ******************************************************************************/
+
+// -----------------------------------------------------------------
+// NOTE:
+// Do not include this file in user code, include "manta.h" instead
+// -----------------------------------------------------------------
+
+#ifdef _MANTA_H
+#  ifndef _PTYPE_H
+#    define _PTYPE_H
+
+#    include <string>
+#    include <vector>
+#    include <map>
+
+class QMutex;
+
+namespace Manta {
+struct PbClassData;
+class FluidSolver;
+class PbArgs;
+
+struct PbType {
+  std::string S;
+  std::string str() const;
+};
+struct PbTypeVec {
+  std::vector<PbType> T;
+  std::string str() const;
+};
+
+//! Base class for all classes exposed to Python
+class PbClass {
+ public:
+  PbClass(FluidSolver *parent, const std::string &name = "", PyObject *obj = NULL);
+  PbClass(const PbClass &a);
+  virtual ~PbClass();
+
+  // basic property setter/getters
+  void setName(const std::string &name)
+  {
+    mName = name;
+  }
+  std::string getName() const
+  {
+    return mName;
+  }
+  PyObject *getPyObject() const
+  {
+    return mPyObject;
+  }
+  void registerObject(PyObject *obj, PbArgs *args);
+  FluidSolver *getParent() const
+  {
+    return mParent;
+  }
+  void setParent(FluidSolver *v)
+  {
+    mParent = v;
+  }
+  void checkParent();
+
+  // hidden flag for GUI, debug output
+  inline bool isHidden()
+  {
+    return mHidden;
+  }
+  inline void setHidden(bool v)
+  {
+    mHidden = v;
+  }
+
+  void lock();
+  void unlock();
+  bool tryLock();
+
+  // PbClass instance registry
+  static int getNumInstances();
+  static PbClass *getInstance(int index);
+  static void renameObjects();
+
+  // converters
+  static bool isNullRef(PyObject *o);
+  static bool isNoneRef(PyObject *o);
+  static PbClass *createPyObject(const std::string &classname,
+                                 const std::string &name,
+                                 PbArgs &args,
+                                 PbClass *parent);
+  inline bool canConvertTo(const std::string &classname)
+  {
+    return Pb::canConvert(mPyObject, classname);
+  }
+
+ protected:
+  QMutex *mMutex;
+  FluidSolver *mParent;
+  PyObject *mPyObject;
+  std::string mName;
+  bool mHidden;
+
+  static std::vector<PbClass *> mInstances;
+};
+
+//!\cond Register
+
+void pbFinalizePlugin(FluidSolver *parent, const std::string &name, bool doTime = true);
+void pbPreparePlugin(FluidSolver *parent, const std::string &name, bool doTime = true);
+void pbSetError(const std::string &fn, const std::string &ex);
+
+//!\endcond
+
+}  // namespace Manta
+
+#  endif
+#endif