DefaultAccessorNamingStrategy converts to lowercases the whole first group of uppercase characters

[etrandafir93]

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Describe the bug

Hello, I've noticed that DefaultAccessorNamingStrategy will convert to lowercase more than one letter that follows the prefix of a getter. This is happening in the for-loop here: DefaultAccessorNamingStrategy::legacyManglePropertyName.

Based on the code and comments, this seems to be the intended default behavior, but it can result in unintuitive outcomes.

This was my use case:

@Data
class MyObject {
    String iPhone; // <-- lombok generates the getter: getIPhone() {...}
}

If we use the default configuration, the resulting json can be a bit surprising:

{ 
    "iphone": "test"
}

Are there use cases where we can benefit from lowercasing more than one character?

Version Information

latest master version

Reproduction

static class MyObj {
  String iPhone;
  // constructor

  public String getIPhone() {
    return iPhone;
  }
}

@Test
void lowercasingMoreThanOneChar() throws Exception {
  ObjectMapper mapper = new ObjectMapper();
  String json = mapper.writeValueAsString(new MyObj("test"));
  assertEquals("{\"iPhone\":\"test\"}", json); // <- fails, the key will be lowercase: "iphone"
}

Expected behavior

The expected outcome was to lowercase only the first character that follows the 'get' prefix.

Additional context

No response