nl_tokens: encompasses all executions in either initialization or running statuses
pl_tokens: function getActiveExecution ( exId ) { const str = terminalStatusList ( ) . map ( state => ` ${ state } ` ) . join ( 'OR' ) ; const query = ` ${ exId } ${ str . trim ( ) } ` ; return searchExecutionContexts ( query , null , 1 , '_created:desc' ) . then ( ( ex ) => { if ( ex . length === 0 ) { const error = new Error ( ` ${ exId } ` ) ; error . code = 404 ; return Promise . reject ( error ) ; } return <mask> [ 0 ] ; } ) ; }