How to use

restore

method

in

com.intellij.lexer.Lexer

private void restoreEExPosition(@NotNull LexerPosition eexPosition) {
  eexLexer.restore(eexPosition);
}

private void restoreElixirPosition(@Nullable LexerPosition elixirPosition) {
  if (elixirPosition != null) {
    elixirLexer.start(getBufferSequence(), eexLexer.getTokenStart(), eexLexer.getTokenEnd());
    elixirLexer.restore(elixirPosition);
  }
}

@Override
public void restore(@NotNull final LexerPosition position) {
  final int prefixLength = prefix.length();
  final int newOffset = position.getOffset() - prefixLength;
  if (newOffset == 0) {
    this.afterPrefix = false;
  }
  if (newOffset < myDelegate.getBufferEnd()) {
    this.delegateEOF = false;
    this.afterEOF = false;
  }
  myDelegate.restore(new LexerPosition() {
    @Override
    public int getOffset() {
      return newOffset;
    }
    @Override
    public int getState() {
      return position.getState();
    }
  });
}