code: public void deselectAllSpans() {
          mBlockCompletion = true;
          Editable text = getText();
          MentionSpan[] spans = text.getSpans(0, text.length(), MentionSpan.class);
          for (MentionSpan span : spans) {
              if (span.isSelected()) {
                  span.setSelected(false);
                  updateSpan(span);
              }
          }
          mBlockCompletion = false;
      }
docs: Deselects any spans in the editor that are currently selected.