code: public static Writer leftShift(Process self, Object value) throws IOException {
          return IOGroovyMethods.leftShift(self.getOutputStream(), value);
      }
docs: Overloads the left shift operator (&lt;&lt;) to provide an append mechanism
  to pipe data to a Process.
  
  @param self  a Process instance
  @param value a value to append
  @return a Writer
  @throws java.io.IOException if an IOException occurs.
  @since 1.0