Constant ISSUE_DEPENDENCIES 

pub const ISSUE_DEPENDENCIES: &str = r#"query($id:ID!,$first:Int!,$after:String){node(id:$id){__typename
      ... on Issue{
        blockedBy(first:$first,after:$after){nodes{...Related}pageInfo{hasNextPage endCursor}}
        blocking(first:$first,after:$after){nodes{...Related}pageInfo{hasNextPage endCursor}}
      }}} fragment Related on Issue{id title body parent{id} subIssuesSummary{total}}"#;

Reads both dependency directions for one issue, with each far end’s own kind.