refactored all operator
refactored any operator
refactored catch exception operator
refactored distinct until changed operator
refactored distinct operator
refactored element at or default operator
refactored element at operator
refactored first operator
refactored flat map operator
refactored fold operator
refactored is empty operator
refactored last or default operator
refactored last operator
refactored max by operator
refactored merge operator
refactored min by operator
refactored pause for operator
refactored scan operator
refactored to array operator
refactored where operator