nl: return solutiongrid concode_field_sep int difficulty concode_elem_sep Grid playerGrid concode_elem_sep Grid initialGrid concode_elem_sep Grid solutionGrid concode_field_sep Grid getInitialGrid concode_elem_sep Set<Cell> getIncorrect concode_elem_sep void setInitialGrid concode_elem_sep int getSize concode_elem_sep boolean hasWon concode_elem_sep Object deepClone concode_elem_sep void reset concode_elem_sep Grid getPlayerGrid concode_elem_sep int getDifficulty concode_elem_sep void setDifficulty
code: Grid function ( ) { return solutionGrid ; }