public void setCurrentHeader(String currentHeader) {
        this.currentHeader = currentHeader;
    }
Contains the unmarshalling state for the parsing of an XML response. The
unmarshallers are stateless so that they can be reused, so this class holds
the state while different unmarshallers work together to parse an XML
response. It also tracks the current position and element depth of the
document being parsed and provides utilties for accessing the next XML event
from the parser, reading element text, handling attribute XML events, etc.
aws-java-sdk-core/src/main/java/com/amazonaws/transform/StaxUnmarshallerContext.java