docs: def convertforinput(self,filepath, metadata):
          """Convert from target format into one of the source formats. Relevant if converters are used in InputTemplates. Metadata already is metadata for the to-be-generated file. 'filepath' is both the source and the target file, the source file will be erased and overwritten with the conversion result!"""
          assert isinstance(metadata, CLAMMetaData) #metadata of the destination file (file to be generated here)
          if not metadata.__class__ in self.acceptforinput:
              raise Exception("Convertor " + self.__class__.__name__ + " can not convert input files to " + metadata.__class__.__name__ + "!")
          return False