+ /**
+ * Reads the value of a feature (FT) qualifier from one or more lines of the
+ * file, and returns the next line after that. Values are appended to the
+ * string buffer, which should be already primed with the value read from the
+ * first line for the qualifier (with any leading double quote removed).
+ * Enclosing double quotes are removed, and escaped (repeated) double quotes
+ * reduced to one only. For example for
+ *
+ * <pre>
+ * FT /note="gene_id=hCG28070.3
+ * FT ""foobar"" isoform=CRA_b"
+ * the returned value is
+ * gene_id=hCG28070.3 "foobar" isoform=CRA_b
+ * </pre>
+ *
+ * Note the side-effect of this method, to advance data reading to the next
+ * line after the feature qualifier.
+ *
+ * @param sb
+ * a string buffer primed with the first line of the value
+ * @param qualifierName
+ * @return
+ * @throws IOException
+ */
+ String parseFeatureQualifier(StringBuilder sb, String qualifierName)
+ throws IOException
+ {