fn completion_item(
acc: &mut Vec<CompletionItem>,
config: &Config,
client_commands: &ClientCommandsConfig,
fields_to_resolve: &CompletionFieldsToResolve,
line_index: &LineIndex,
version: Option<i32>,
tdpp: &TextDocumentPositionParams,
max_relevance: u32,
completion_trigger_character: Option<char>,
item: CompletionItem,
)