function groovy(Prism) {
  Prism.languages.groovy = Prism.languages.extend('clike', {
    string: [
      {
        // https://groovy-lang.org/syntax.html#_dollar_slashy_string
        pattern:
          /("""|''')(?:[^\\]|\\[\s\S])*?\1|\$\/(?:[^/$]|\$(?:[/$]|(?![/$]))|\/(?!\$))*\/\$/,
        greedy: true
      },
      {
        // TODO: Slash strings (e.g. /foo/) can contain line breaks but this will cause a lot of trouble with
        // simple division (see JS regex), so find a fix maybe?
        pattern: /(["'/])(?:\\.|(?!\1)[^\\\r\n])*\1/,
        greedy: true
      }
    ],
    keyword:
      /\b(?:abstract|as|assert|boolean|break|byte|case|catch|char|class|const|continue|def|default|do|double|else|enum|extends|final|finally|float|for|goto|if|implements|import|in|instanceof|int|interface|long|native|new|package|private|protected|public|return|short|static|strictfp|super|switch|synchronized|this|throw|throws|trait|transient|try|void|volatile|while)\b/,
    number:
      /\b(?:0b[01_]+|0x[\da-f_]+(?:\.[\da-f_p\-]+)?|[\d_]+(?:\.[\d_]+)?(?:e[+-]?\d+)?)[glidf]?\b/i,
    operator: {
      pattern:
        /(^|[^.])(?:~|==?~?|\?[.:]?|\*(?:[.=]|\*=?)?|\.[@&]|\.\.<|\.\.(?!\.)|-[-=>]?|\+[+=]?|!=?|<(?:<=?|=>?)?|>(?:>>?=?|=)?|&[&=]?|\|[|=]?|\/=?|\^=?|%=?)/,
      lookbehind: true
    },
    punctuation: /\.+|[{}[\];(),:$]/
  })
  Prism.languages.insertBefore('groovy', 'string', {
    shebang: {
      pattern: /#!.+/,
      alias: 'comment'
    }
  })
  Prism.languages.insertBefore('groovy', 'punctuation', {
    'spock-block': /\b(?:and|cleanup|expect|given|setup|then|when|where):/
  })
  Prism.languages.insertBefore('groovy', 'function', {
    annotation: {
      pattern: /(^|[^.])@\w+/,
      lookbehind: true,
      alias: 'punctuation'
    }
  }) // Handle string interpolation
  Prism.hooks.add('wrap', function (env) {
    if (env.language === 'groovy' && env.type === 'string') {
      var delimiter = env.content.value[0]
      if (delimiter != "'") {
        var pattern = /([^\\])(?:\$(?:\{.*?\}|[\w.]+))/
        if (delimiter === '$') {
          pattern = /([^\$])(?:\$(?:\{.*?\}|[\w.]+))/
        } // To prevent double HTML-encoding we have to decode env.content first
        env.content.value = env.content.value
          .replace(/&lt;/g, '<')
          .replace(/&amp;/g, '&')
        env.content = Prism.highlight(env.content.value, {
          expression: {
            pattern: pattern,
            lookbehind: true,
            inside: Prism.languages.groovy
          }
        })
        env.classes.push(delimiter === '/' ? 'regex' : 'gstring')
      }
    }
  })
}
@param {string} source
@param {number} level
@returns {string}