NativeMessageHeaderAccessor.getFirstNativeHeader

Return the first value for the specified native header, or {@code null} if none.

  1. string getFirstNativeHeader(string headerName)
    class NativeMessageHeaderAccessor
    string
    getFirstNativeHeader
    (
    string headerName
    )
  2. string getFirstNativeHeader(string headerName, Map!(string, Object) headers)

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