| ^^^^^^^^
|
= help: items from traits can only be used if the trait is implemented and in scope
- = note: the following traits define an item `is_empty`, perhaps you need to implement one of them:
+ = note: the following trait defines an item `is_empty`, perhaps you need to implement it:
candidate #1: `std::iter::ExactSizeIterator`
- candidate #2: `core::slice::SliceExt`
- candidate #3: `core::str::StrExt`
error: aborting due to previous error