code: public BooleanExpression equalsIgnoreCase(Expression<String> str) {
          return Expressions.booleanOperation(Ops.EQ_IGNORE_CASE, mixin, str);
      }
docs: Create a {@code this.equalsIgnoreCase(str)} expression
  
  <p>Compares this {@code StringExpression} to another {@code StringExpression}, ignoring case
  considerations.</p>
  
  @param str string
  @return this.equalsIgnoreCase(str)
  @see java.lang.String#equalsIgnoreCase(String)