question: a convenience shorthand for sessiondata #get string . concode_field_sep PlaceHolder placeHolder concode_field_sep JavaSessionSerializer getJavaSerializer concode_elem_sep Operation set concode_elem_sep Operation set concode_elem_sep Operation set concode_elem_sep Operation set concode_elem_sep Operation set concode_elem_sep Operation set concode_elem_sep Operation set concode_elem_sep Operation set concode_elem_sep boolean isDirty concode_elem_sep Operation clear concode_elem_sep Operation save concode_elem_sep String getId concode_elem_sep Promise<T> require concode_elem_sep Promise<T> require concode_elem_sep Promise<T> require concode_elem_sep Promise<T> require concode_elem_sep Promise<?> require concode_elem_sep Promise<?> require concode_elem_sep Promise<Set<SessionKey<?>>> getKeys concode_elem_sep Operation terminate concode_elem_sep Operation remove concode_elem_sep Operation remove concode_elem_sep Operation remove concode_elem_sep SessionSerializer getDefaultSerializer concode_elem_sep Promise<SessionData> getData
target: Promise < Optional < ? >> function ( String arg0 ) { return getData ( ) . map ( d -> d . get ( arg0 ) ) ; }