//snippet manager is included for managing snippets
var snippetManager =  ace.acequire('ace/snippets').snippetManager;
// getting existing snippet array (free from special characters, n etc)
var m = snippetManager.files[this.editor._editor.session.$mode.$id];
m.snippetText = this.snippettext;
// unregister already esisting snippets
snippetManager.unregister(m.snippets);
m.snippets = snippetManager.parseSnippetFile(m.snippetText, m.scope);
// register newly added snippets along with old snippets
snippetManager.register(m.snippets,'tex');