How to use the @grafana/ui.DOMUtil.getNextCharacter function in @grafana/ui

// Modify suggestion based on context
  switch (typeaheadContext) {
    case 'context-labels': {
      const nextChar = DOMUtil.getNextCharacter();
      if (!nextChar || nextChar === '}' || nextChar === ',') {
        suggestion += '=';
      }
      break;
    }

    case 'context-label-values': {
      // Always add quotes and remove existing ones instead
      if (!typeaheadText.match(/^(!?=~?"|")/)) {
        suggestion = `"${suggestion}`;
      }
      if (DOMUtil.getNextCharacter() !== '"') {
        suggestion = `${suggestion}"`;
      }
      break;
    }

    default:
  }
  return suggestion;
}

applyTypeahead = (editor: CoreEditor, suggestion: { text: any; type: string; deleteBackwards: any }): CoreEditor => {
    const { typeaheadPrefix, typeaheadContext, typeaheadText } = this.state;
    let suggestionText = suggestion.text || suggestion;
    const move = 0;

    // Modify suggestion based on context

    const nextChar = DOMUtil.getNextCharacter();
    if (suggestion.type === 'function') {
      if (!nextChar || nextChar !== '(') {
        suggestionText += '(';
      }
    } else if (typeaheadContext === 'context-function') {
      if (!nextChar || nextChar !== ')') {
        suggestionText += ')';
      }
    } else {
      if (!nextChar || nextChar !== ' ') {
        suggestionText += ' ';
      }
    }

    // Remove the current, incomplete text and replace it with the selected suggestion
    const backward = suggestion.deleteBackwards || typeaheadPrefix.length;

export function willApplySuggestion(suggestion: string, { typeaheadContext, typeaheadText }: SuggestionsState): string {
  // Modify suggestion based on context
  switch (typeaheadContext) {
    case 'context-labels': {
      const nextChar = DOMUtil.getNextCharacter();
      if (!nextChar || nextChar === '}' || nextChar === ',') {
        suggestion += '=';
      }
      break;
    }

    case 'context-label-values': {
      // Always add quotes and remove existing ones instead
      if (!typeaheadText.match(/^(!?=~?"|")/)) {
        suggestion = `"${suggestion}`;
      }
      if (DOMUtil.getNextCharacter() !== '"') {
        suggestion = `${suggestion}"`;
      }
      break;
    }

// Modify suggestion based on context
  switch (typeaheadContext) {
    case 'context-labels': {
      const nextChar = DOMUtil.getNextCharacter();
      if (!nextChar || nextChar === '}' || nextChar === ',') {
        suggestion += '=';
      }
      break;
    }

    case 'context-label-values': {
      // Always add quotes and remove existing ones instead
      if (!typeaheadText.match(/^(!?=~?"|")/)) {
        suggestion = `"${suggestion}`;
      }
      if (DOMUtil.getNextCharacter() !== '"') {
        suggestion = `${suggestion}"`;
      }
      break;
    }

    default:
  }
  return suggestion;
}

export function willApplySuggestion(suggestion: string, { typeaheadContext, typeaheadText }: SuggestionsState): string {
  // Modify suggestion based on context
  switch (typeaheadContext) {
    case 'context-labels': {
      const nextChar = DOMUtil.getNextCharacter();
      if (!nextChar || nextChar === '}' || nextChar === ',') {
        suggestion += '=';
      }
      break;
    }

    case 'context-label-values': {
      // Always add quotes and remove existing ones instead
      if (!typeaheadText.match(/^(!?=~?"|")/)) {
        suggestion = `"${suggestion}`;
      }
      if (DOMUtil.getNextCharacter() !== '"') {
        suggestion = `${suggestion}"`;
      }
      break;
    }

// Modify suggestion based on context
  switch (typeaheadContext) {
    case 'context-labels': {
      const nextChar = DOMUtil.getNextCharacter();
      if (!nextChar || nextChar === '}' || nextChar === ',') {
        suggestion += '=';
      }
      break;
    }

    case 'context-label-values': {
      // Always add quotes and remove existing ones instead
      if (!typeaheadText.match(/^(!?=~?"|")/)) {
        suggestion = `"${suggestion}`;
      }
      if (DOMUtil.getNextCharacter() !== '"') {
        suggestion = `${suggestion}"`;
      }
      break;
    }

    default:
  }
  return suggestion;
}

function willApplySuggestion(suggestion: string, { typeaheadContext, typeaheadText }: SuggestionsState): string {
  // Modify suggestion based on context
  switch (typeaheadContext) {
    case 'context-labels': {
      const nextChar = DOMUtil.getNextCharacter();
      if (!nextChar || nextChar === '}' || nextChar === ',') {
        suggestion += '=';
      }
      break;
    }

    case 'context-label-values': {
      // Always add quotes and remove existing ones instead
      if (!typeaheadText.match(/^(!?=~?"|")/)) {
        suggestion = `"${suggestion}`;
      }
      if (DOMUtil.getNextCharacter() !== '"') {
        suggestion = `${suggestion}"`;
      }
      break;
    }

// Modify suggestion based on context
  switch (typeaheadContext) {
    case 'context-labels': {
      const nextChar = DOMUtil.getNextCharacter();
      if (!nextChar || nextChar === '}' || nextChar === ',') {
        suggestion += '=';
      }
      break;
    }

    case 'context-label-values': {
      // Always add quotes and remove existing ones instead
      if (!typeaheadText.match(/^(!?=~?"|")/)) {
        suggestion = `"${suggestion}`;
      }
      if (DOMUtil.getNextCharacter() !== '"') {
        suggestion = `${suggestion}"`;
      }
      break;
    }

    default:
  }
  return suggestion;
}

function willApplySuggestion(suggestion: string, { typeaheadContext, typeaheadText }: SuggestionsState): string {
  // Modify suggestion based on context
  switch (typeaheadContext) {
    case 'context-labels': {
      const nextChar = DOMUtil.getNextCharacter();
      if (!nextChar || nextChar === '}' || nextChar === ',') {
        suggestion += '=';
      }
      break;
    }

    case 'context-label-values': {
      // Always add quotes and remove existing ones instead
      if (!typeaheadText.match(/^(!?=~?"|")/)) {
        suggestion = `"${suggestion}`;
      }
      if (DOMUtil.getNextCharacter() !== '"') {
        suggestion = `${suggestion}"`;
      }
      break;
    }