com_baeldung_hystrix_SpringAndHystrixIntegrationTest_java
org.springframework.boot.context.properties.source.SystemEnvironmentPropertyMapper
 -> java.lang.CharSequence.length(): int -> java.lang.CharSequence.subSequence(int,int): java.lang.CharSequence -> java.lang.CharSequence.toString(): java.lang.String -> java.lang.String.indexOf(int): int -> java.lang.CharSequence.subSequence(int,int): java.lang.CharSequence -> java.lang.CharSequence.toString(): java.lang.String -> java.lang.String.indexOf(int): int