code: public void appendWhere(CharSequence inWhere) {
          if (mWhereClause == null) {
              mWhereClause = new StringBuilder(inWhere.length() + 16);
          }
          if (mWhereClause.length() == 0) {
              mWhereClause.append('(');
          }
          mWhereClause.append(inWhere);
      }
docs: Append a chunk to the WHERE clause of the query. All chunks appended are surrounded
  by parenthesis and ANDed with the selection passed to {@link #query}. The final
  WHERE clause looks like:
  
  WHERE (&lt;append chunk 1>&lt;append chunk2>) AND (&lt;query() selection parameter>)
  
  @param inWhere the chunk of text to append to the WHERE clause.