stop the timer . note : no effect if timer is already stopped . concode_field_sep boolean started concode_elem_sep long last concode_elem_sep long cumulate concode_field_sep boolean readable concode_elem_sep long read concode_elem_sep String nanoTimeToString concode_elem_sep void start concode_elem_sep void reset concode_elem_sep String toString concode_elem_sep void main concode_elem_sep boolean isStarted
void function ( ) { if ( this . started ) { this . started = false ; this . cumulate += System . nanoTime ( ) - this . last ; } }