javascript - ckeditor buttons not showing -

i have following setup ckeditor:

ckeditor.inline('editor1', {     startupfocus: true,     extraplugins: 'sharedspace',     removeplugins: 'forms',     sharedspaces: {         top: 'top',     },     toolbargroups: [         { name: 'print' },         { name: 'stuff', groups:['print','preview','find' ]},         '/',         { name: 'document' },         { name: 'clipboard', groups: ['clipboard', 'undo'] },         { name: 'editing', groups: ['find', 'selection', 'spellchecker'] },         '/',         { name: 'basicstyles', groups: ['basicstyles', 'cleanup'] },         { name: 'paragraph', groups: ['list', 'indent', 'blocks', 'align', 'bidi'] },         { name: 'links' },         { name: 'insert' },         '/',         { name: 'styles' },         { name: 'colors' },         { name: 'tools' },         { name: 'others' },     ] }); 

but reason print button isn't showing. plugin in folder. (the same preview)

but when add plugin (e.g. find), shows in toolbar fine. result in view:

any clue why isn't loaded?

it seems print button not available inline editor.