pub fn collect_fields<'a>(
selection_set: &SelectionSet,
parent_type: &TypeDefinition,
known_fragments: &HashMap<&str, &FragmentDefinition>,
context: &'a OperationVisitorContext<'a>,
) -> HashMap<String, Vec<Field>>
pub fn collect_fields<'a>(
selection_set: &SelectionSet,
parent_type: &TypeDefinition,
known_fragments: &HashMap<&str, &FragmentDefinition>,
context: &'a OperationVisitorContext<'a>,
) -> HashMap<String, Vec<Field>>