TargetHealth 
    class TargetHealth
Information about the connection health of an RDS Proxy target.
Types
Properties
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                  A description of the health of the RDS Proxy target. If the State is AVAILABLE, a description is not included.
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                  The reason for the current health State of the RDS Proxy target.
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                  The current state of the connection health lifecycle for the RDS Proxy target. The following is a typical lifecycle example for the states of an RDS Proxy target: