configureToolbarInlineOptions(toolbarConfig) {
    const { inlineButtons } = this.props;
    return toolbarConfig && toolbarConfig.inline
      ? toolbarConfig.inline.map(type => inlineButtons.find(button => button.style === type))
        .filter(button => button !== undefined)
      : inlineButtons;
  }
Override which text modifications are available according INLINE_BUTTONS style property.
CASE SENSITIVE. Would be good clean up to lowercase inline styles consistently.
Defaults all of them if no toolbarConfig.inline passed:
  inline: ['BOLD', 'ITALIC', 'UNDERLINE', 'hyperlink', 'HIGHLIGHT'],
Example parameter: toolbarConfig = {
  block: ['ordered-list-item', 'unordered-list-item'],
  inline: ['BOLD', 'ITALIC', 'UNDERLINE', 'hyperlink'],
};