How to define two statements within a block？

[wcy1997]

I want to search for vulnerability code for unique_ptr moved twice. Therefore, I need to search for code snippets in the same block for double move statements. For example,
{ std::move(a); std::move(a) }
How can I search such code snippets?

p.s. I find that tree-sitter supports such feature.

[wcy1997]

tree-sitter doc： https://tree-sitter.github.io/tree-sitter/using-parsers#query-syntax