expressionsBySyntax.put( expr.getSyntax(), expr );
                }
            }
        }

        return expressionsBySyntax;
    }

    public void flushExpressionsBySyntax()
    {
        expressionsBySyntax = null;
    }
]]></code>
        </codeSegment>
      </codeSegments>
    </class>
    <class>
      <version>1.0.0</version>
      <name>Expression</name>