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