Groups end extract single line statements such as operations on fields/local variables, IF and
WHILE statements and extract new method for each group making them smaller.
This class provides an empty implementation of JavaParserListener,
which can be extended to create a listener which only needs to handle a subset
of the available methods.
This class provides an empty implementation of JavaParserVisitor,
which can be extended to create a visitor which only needs to handle a subset
of the available methods.