message: Make some properties private.
diff: @@ -21,13 +21,13 @@ export class MathPreviewPanelSerializer implements vscode.WebviewPanelSerializer
  }
  export class MathPreviewPanel {
  - extension: Extension
  - mathPreview: MathPreview
  - panel?: vscode.WebviewPanel
  - prevDocumentUri?: string
  - prevCursorPosition?: vscode.Position
  - prevNewCommands?: string
  - mathPreviewPanelSerializer: MathPreviewPanelSerializer
  + private readonly extension: Extension
  + private readonly mathPreview: MathPreview
  + private panel?: vscode.WebviewPanel
  + private prevDocumentUri?: string
  + private prevCursorPosition?: vscode.Position
  + private prevNewCommands?: string
  + readonly mathPreviewPanelSerializer: MathPreviewPanelSerializer
  constructor(extension: Extension) {
  this.extension = extension
  @@ -53,7 +53,7 @@ export class MathPreviewPanel {
  const configuration = vscode.workspace.getConfiguration('latex-workshop')
  const editorGroup = configuration.get('mathpreviewpanel.editorGroup') as string
  await openWebviewPanel(panel, editorGroup)
  - this.extension.mathPreview.getColor()
  + this.mathPreview.getColor()
  setTimeout(() => this.update(), 700)
  }
  @@ -72,7 +72,7 @@ export class MathPreviewPanel {
  this.clearCache()
  }
  - clearCache() {
  + private clearCache() {
  this.prevDocumentUri = undefined
  this.prevCursorPosition = undefined
  this.prevNewCommands = undefined
  @@ -133,7 +133,7 @@ export class MathPreviewPanel {
  return this.panel.webview.postMessage({type: 'mathImage', src: svgDataUrl })
  }
  - getTexMath(document: vscode.TextDocument, position: vscode.Position) {
  + private getTexMath(document: vscode.TextDocument, position: vscode.Position) {
  const texMath = this.mathPreview.findMathEnvIncludingPosition(document, position)
  if (texMath) {
  // this.renderCursor(document, texMath)
  