class_docstr: Test Admonition Extension. 
class_docstr_tok: ["Test","Admonition","Extension","."]
code: def testRE(self):
      RE = self.md.parser.blockprocessors["admonition"].RE
      tests = [
          ("!!! note", ("note", None)),
          ('!!! note "Please Note"', ("note", "Please Note")),
          ('!!! note ""', ("note", "")),
      ]
      for test, expected in tests:
          self.assertEqual(RE.match(test).groups(), expected)
  
imports: import unittest
  import markdown
label_desc: Use image node_id 2 for calling the TestAdmonition obj's underlying member method code with example usage: obj.testRE() without return types