Function chunk_file 

pub fn chunk_file<D: Doc>(
    root: &AstGrep<D>,
    source: &str,
    file_path: &str,
    symbols: &[Symbol],
    config: &ChunkConfig,
) -> Vec<CodeChunk>
where
    D::Lang: Language,

Chunk a file using its CST tree.

• root: the ast-grep parsed root (AstGrep instance).
• source: the raw source string.
• file_path: path to the source file (stored in each chunk).
• symbols: symbols extracted from this file (used for parent resolution).
• config: chunking parameters.