question: replaces getcontexts call but ensures that if list not yet initialized then empty list will be returned concode_field_sep PlaceHolder placeHolder concode_field_sep Set<T> getContexts concode_elem_sep void setContexts concode_elem_sep void addToContextList concode_elem_sep List<T> getContextsByLowestContext concode_elem_sep Integer getId concode_elem_sep void addContext concode_elem_sep T getOrCreateContext concode_elem_sep T getContext concode_elem_sep T createContext
target: Set < T > function ( ) { if ( getContexts ( ) == null ) { return Collections . unmodifiableSet ( new HashSet < T > ( ) ) ; } return getContexts ( ) ; }