typesystem/src/main/java/org/apache/atlas/typesystem/types/TraitType.java [82:97]:
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    public void updateSignatureHash(MessageDigest digester, Object val) throws AtlasException {
        if( !(val instanceof  ITypedStruct)) {
            throw new IllegalArgumentException("Unexpected value type " + val.getClass().getSimpleName() + ". Expected instance of ITypedStruct");
        }
        digester.update(getName().getBytes(Charset.forName("UTF-8")));

        if(fieldMapping.fields != null && val != null) {
            IStruct typedValue = (IStruct) val;
            for (AttributeInfo aInfo : fieldMapping.fields.values()) {
                Object attrVal = typedValue.get(aInfo.name);
                if(attrVal != null) {
                    aInfo.dataType().updateSignatureHash(digester, attrVal);
                }
            }
        }
    }
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typesystem/src/main/java/org/apache/atlas/typesystem/types/StructType.java [259:274]:
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    public void updateSignatureHash(MessageDigest digester, Object val) throws AtlasException {
        if( !(val instanceof  ITypedStruct)) {
            throw new IllegalArgumentException("Unexpected value type " + val.getClass().getSimpleName() + ". Expected instance of ITypedStruct");
        }
        digester.update(getName().getBytes(Charset.forName("UTF-8")));

        if(fieldMapping.fields != null && val != null) {
            IStruct typedValue = (IStruct) val;
            for (AttributeInfo aInfo : fieldMapping.fields.values()) {
                Object attrVal = typedValue.get(aInfo.name);
                if(attrVal != null) {
                    aInfo.dataType().updateSignatureHash(digester, attrVal);
                }
            }
        }
    }
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