How to generation regex properties as java Map

Description

How to generation regex properties as java Map
I have regex property "^([OD_]{3}[A-Z]{3}[A-Z_]{4}[0-9_]{3}[0-9999]{8})+$"
and it gen to
@JsonProperty("^([OD_]{3}[A-Z]{3}[A-Z_]{4}[0-9_]{3}[0-9999]{8})+$")
private InlineResponse2002FlightsOriginDestinationInformationOD3AZ3AZ4093099998 _oD3AZ3AZ4093099998$ = null;

Swagger-codegen version

io.swagger.codegen.v3 swagger-codegen-maven-plugin 3.0.32 air generate ./openapi3/services_definitions_v2.0.0.json com.kiu.sys.rest.api.atpco.services_v2 com.kiu.sys.rest.api.atpco.handler.services_v2

			<language>java</language>
			<configOptions>
				<sourceFolder>src/main/java</sourceFolder>
				<hideGenerationTimestamp>true</hideGenerationTimestamp>
				<java8>true</java8>
				<dateLibrary>java8</dateLibrary>
				<interfaceOnly>true</interfaceOnly>
				<library>resttemplate</library>
				<serializableModel>true</serializableModel>
			</configOptions>
		</configuration>
	</execution>
</executions>

Swagger declaration file content or url

"responses": {
"200": {
"description": "The response of get_availability method.",
"content": {
"application/json": {
"examples": {},
"schema": {
"type": "object",
"properties": {
"flights_origin_destination_information": {
"type": "object",
"description": "Description of each origin_destination with date of departure requested by each directionality.",
"properties": {
"^([OD_]{3}[A-Z]{3}[A-Z_]{4}[0-9_]{3}[0-9999]{8})+$": {
"type": "object",
"description": "Dynamic key name reference to origin_destination_reference_key of the object origin_destination_information.",
"example": ["OD_JNBSEZ_02_20210413"],
"properties": {
"arrival_information": {
"type": "object",
"description": "This object hold the point of destination location code.",
"properties": {
"location_reference_id": {"$ref": "#/components/schemas/location_reference_id"}
}
},
"departure_information": {
"type": "object",
"description": "This object holds the point of departure location code",
"properties": {
"location_reference_id": {"$ref": "#/components/schemas/location_reference_id"},
"date": {
"type": "string",
"description": "Date of departure.",
"format": "date"
}
}
}
}
}
}
}
}
}
}
}
}
}

No source file or test is named. Reproduce generation with the supplied Maven configuration and OpenAPI schema, then trace the Java model templates and property handling; done means the regex-keyed object is represented as a Java Map without an invalid mangled property name.