monaco.languages.registerCompletionItemProvider('typescript', {
                                //triggerCharacters: ['.'],
                                provideCompletionItems: (model, position, context) => {
                                    let suggestions = [];
                                    const wordUntilPosition = model.getWordUntilPosition(position);
                                    // calculate range to pass to suggestions
                                    const range = {
                                      startLineNumber: position.lineNumber,
                                      startColumn: wordUntilPosition.startColumn,
                                      endLineNumber: position.lineNumber,
                                      endColumn: wordUntilPosition.endColumn
                                    };
                                    
                                    const wordAtPosition = model.getWordAtPosition({ lineNumber: position.lineNumber, column: Math.max(position.column, 0) });
                                    // if word at position before the dot is namespace you want to support
                                    // in my case it was word tags
                                    if (wordAtPosition.word.length > 0 && wordAtPosition.word.charAt(0) == wordAtPosition.word.charAt(0).toUpperCase()) 
                                    {
                                      // namespace autocomplete suggestions for "tags."
                                      suggestions.push({
                                            label: "Content (org.ametys.cms.repository.Content)",
                                            kind: monaco.languages.CompletionItemKind.Class,
                                            insertText: "org.ametys.cms.repository.Content"
                                      });
                                    }
                                    else {
                                      // otherwise I generate another list of suggestions e.g. to show autocompletions for keywords or add custom snippets support
                                    }
                                    return { suggestions };
                                }
                            });