Function append_conditions 

pub fn append_conditions<C: Conventions>(input: TokenStream) -> TokenStream

#[derive(AppendConditions)]: queryweave_sql::AppendConditions for a filter-options wrapper, appending its set filters to a query as conditions.

#[append_conditions(columns = Entity)] names the entity (deriving Columns) whose columns store the filtered domain fields.

Attributes: append_conditions (columns).