public GroovyAssignmentExpressionPattern operation(final IElementType pattern) {
    return with(new PatternCondition<>("operation") {
      @Override
      public boolean accepts(@NotNull final GrAssignmentExpression psiBinaryExpression, final ProcessingContext context) {
        return pattern == psiBinaryExpression.getOperationTokenType();
      }
    });
  }
public GroovyAssignmentExpressionPattern operation(final IElementType pattern)