getProp(tableName, varName) {
        return this.props[tableName][varName];
    }
Retrieves the value of a networked property
@param {string} tableName - Table name (e.g., DT_BaseEntity)
@param {string} varName - Network variable name (e.g., m_vecOrigin)
@returns {*} Property value, `undefined` if non-existent
@public