[REF] removed_sessions: use a set() instead of a list(), because it's more efficient.
[REF] removed_sessions: use a set() instead of a list(), because it's more efficient.
splbio/openerp-web,vnc-biz/openerp-web,MarkusTeufelberger/openerp-web,vnc-biz/openerp-web,MarkusTeufelberger/openerp-web,gisce/openerp-web,gisce/openerp-web,MarkusTeufelberger/openerp-web,vnc-biz/openerp-web,vnc-biz/openerp-web,splbio/openerp-web,gisce/openerp-web,splbio/openerp-web