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Checking Whether Duration is in Correct Data Type

Duration is valid

				
					{"blocks":"<xml xmlns=\"https://developers.google.com/blockly/xml\"><block type=\"DateTime_Duration_isValid\"><value name=\"duration\"><block type=\"variables_get\"><field name=\"VAR\">duration</field></block></value></block></xml>"}
				
			

This block is used to check whether the duration is in the correct data type. 

Parameters: Duration
Output: Boolean (True/False)
Sample code:

When it is in the correct type, the output:
				
					{"blocks":"<xml xmlns=\"https://developers.google.com/blockly/xml\"><block type=\"pxt-on-start\"><statement name=\"HANDLER\"><block type=\"variables_set\"><field name=\"VAR\">mainLayout</field><value name=\"VALUE\"><shadow type=\"math_number\"><field name=\"NUM\">0</field></shadow><block type=\"ScreenItem_createLayout\"/></value><next><block type=\"variables_set\"><field name=\"VAR\">mainScreen</field><value name=\"VALUE\"><shadow type=\"math_number\"><field name=\"NUM\">0</field></shadow><block type=\"Screen_create\"><value name=\"label\"><shadow type=\"text\"><field name=\"TEXT\">Main</field></shadow></value><value name=\"layout\"><block type=\"variables_get\"><field name=\"VAR\">mainLayout</field></block></value></block></value><next><block type=\"variables_set\"><field name=\"VAR\">duration</field><value name=\"VALUE\"><shadow type=\"math_number\"><field name=\"NUM\">0</field></shadow><block type=\"DateTime_parseDuration\"><value name=\"s\"><shadow type=\"text\"><field name=\"TEXT\">P4Y3M15DT23H20M30S</field></shadow></value></block></value><next><block type=\"controls_if\"><mutation else=\"1\"/><value name=\"IF0\"><shadow type=\"logic_boolean\"><field name=\"BOOL\">TRUE</field></shadow><block type=\"DateTime_Duration_isValid\"><value name=\"duration\"><block type=\"variables_get\"><field name=\"VAR\">duration</field></block></value></block></value><statement name=\"DO0\"><block type=\"ScreenItem_Layout_add\"><value name=\"this\"><block type=\"variables_get\"><field name=\"VAR\">mainLayout</field></block></value><value name=\"item\"><block type=\"Control_createTextBlock\"><mutation xmlns=\"http://www.w3.org/1999/xhtml\" _expanded=\"1\" _input_init=\"true\"></mutation><value name=\"text\"><shadow type=\"text\"><field name=\"TEXT\">It is valid.</field></shadow></value></block></value></block></statement><statement name=\"ELSE\"><block type=\"ScreenItem_Layout_add\"><value name=\"this\"><block type=\"variables_get\"><field name=\"VAR\">mainLayout</field></block></value><value name=\"item\"><block type=\"Control_createTextBlock\"><mutation xmlns=\"http://www.w3.org/1999/xhtml\" _expanded=\"1\" _input_init=\"true\"></mutation><value name=\"text\"><shadow type=\"text\"><field name=\"TEXT\">It is not valid.</field></shadow></value></block></value></block></statement></block></next></block></next></block></next></block></statement></block></xml>"}
				
			
When it is in the wrong type, the output: