question: construct a key based on a java class object , useful for singletons . concode_field_sep Object key concode_field_sep void set concode_elem_sep void set concode_elem_sep T get concode_elem_sep T get concode_elem_sep T createValue concode_elem_sep T getOrNull
target: StoredValue < T > function ( Class < T > arg0 ) { return new StoredValue < > ( arg0 ) ; }