@Override
    public boolean equals(final Object o) {
        if (this == o) {
            return true;
        }
        if (o == null || getClass() != o.getClass()) {
            return false;
        }
        final SourceLocation that = (SourceLocation) o;
        return metaId == that.metaId &&
                partIndex == that.partIndex &&
                recordIndex == that.recordIndex &&
                Objects.equals(childType, that.childType) &&
                Objects.equals(dataRange, that.dataRange) &&
                Objects.equals(highlights, that.highlights);
    }
@return The identifier i.e. strm:part:segment (one based for human use)
stroom-core-shared/src/main/java/stroom/pipeline/shared/SourceLocation.java