Pihrtsoft.Text.RegularExpressions.Linq.PatternBuilder.AppendBackAssertion C# (CSharp) Method

        public void AppendBackAssertion(object content)
        {
            AppendGroupStart();

            if (_fBuilder)
                _builder.AddInfo(SyntaxKind.BackAssertion);

            AppendDirect("<=");
            AppendGroupContent(content);
            AppendGroupEnd();
        }

 internal override void AppendTo(PatternBuilder builder)
 {
     builder.AppendBackAssertion(_backAssertion);
     builder.Append(_content);
     builder.AppendAssertion(_assertion);
 }