需要扩展：String

["SSCB3","<block xmlns=\"http://www.w3.org/1999/xhtml\" type=\"procedures_definition_return\"><value name=\"custom_block\"><shadow type=\"procedures_prototype_return\"><mutation proccode=\"字符串. %s 包含几个 %s\" argumentids=\"[&quot;b;(9.AlzeHkt|WLNCwl$&quot;,&quot;V-%T4~)yS^^,/(}JF^Fo&quot;]\" argumentnames=\"[&quot;string&quot;,&quot;str&quot;]\" argumentdefaults=\"[&quot;&quot;,&quot;&quot;]\" warp=\"false\" global=\"false\" return=\"true\"></mutation><value name=\"b;(9.AlzeHkt|WLNCwl$\"><shadow type=\"argument_reporter_string_number\"><field name=\"VALUE\">string</field></shadow></value><value name=\"V-%T4~)yS^^,/(}JF^Fo\"><shadow type=\"argument_reporter_string_number\"><field name=\"VALUE\">str</field></shadow></value></shadow></value><next><block type=\"procedures_return\"><value name=\"VALUE\"><shadow type=\"text\"><field name=\"TEXT\"></field></shadow><block type=\"operator_subtract\"><value name=\"NUM1\"><shadow type=\"math_number\"><field name=\"NUM\"></field></shadow><block type=\"jasonxu.string.checkLength.opcode\"><value name=\"CUTER\"><shadow type=\"text\"><field name=\"TEXT\"></field></shadow><block type=\"argument_reporter_string_number\"><field name=\"VALUE\">str</field></block></value><value name=\"LIST\"><shadow type=\"text\"><field name=\"TEXT\"></field></shadow><block type=\"argument_reporter_string_number\"><field name=\"VALUE\">string</field></block></value></block></value><value name=\"NUM2\"><shadow type=\"math_number\"><field name=\"NUM\">1</field></shadow></value></block></value></block></next></block>"]