'@type': type.googleapis.com/envoy.extensions.filters.http.wasm.v3.Wasm
      config:
        configuration:
          '@type': type.googleapis.com/google.protobuf.StringValue
          value: '{"header_1":"some_value_1","header_2":"another_value"}'
        name: default.display-metadata
        vmConfig:
          code:
            local:

                        },
                        "configuration": {
                            "@type": "type.googleapis.com/google.protobuf.StringValue",
                            "value": "{\"header_1\":\"some_value_1\",\"header_2\":\"another_value\"}"
                        }
                    }
                }
            },
            "lastUpdated": "2022-12-08T11:03:53.225Z"
        },
        {

                                "configuration": {
                                    "@type": "type.googleapis.com/google.protobuf.StringValue",
                                    "value": "{\"header_1\":\"some_value_1\",\"header_2\":\"another_value\"}"
                                }
                            }
                        }
                    },
                    "last_updated": "2022-12-08T11:03:53.225Z"

		rune rune
		want int
	}{
		{"", 'a', -1},
		{"", '☺', -1},
		{"foo", '☹', -1},
		{"foo", 'o', 1},
		{"foo☺bar", '☺', 3},
		{"foo☺☻☹bar", '☹', 9},
		{"a A x", 'A', 2},
		{"some_text=some_value", '=', 9},
		{"☺a", 'a', 3},
		{"a☻☺b", '☺', 4},
		{"𠀳𠀗𠀾𠁄𠀧𠁆𠁂𠀫𠀖𠀪𠀲𠀴𠁀𠀨𠀿", '𠀿', 56},

		// 2 bytes
		{"ӆ", 'ӆ', 0},
		{"a", 'ӆ', -1},
		{"  ӆ", 'ӆ', 2},
		{"  a", 'ӆ', -1},