fn process_delimiter(
ctx: &AssistContext<'_, '_>,
source: &SourceFile,
editor: &SyntaxEditor,
list: &impl AstNode,
first_insert: Vec<SyntaxElement>,
)fn process_delimiter(
ctx: &AssistContext<'_, '_>,
source: &SourceFile,
editor: &SyntaxEditor,
list: &impl AstNode,
first_insert: Vec<SyntaxElement>,
)