Example of docgen result after applying fix

Author: alexslavr

api-reference/10 UI Components/DateBoxBase/1 Configuration/max.md

@@ -1,6 +1,6 @@
 ---
 id: DateBoxBase.Options.max
-type: Date | Number | String | undefined
+type: Date | Number | String | null | undefined
 default: undefined
 ---
 ---

api-reference/10 UI Components/DateBoxBase/1 Configuration/min.md

@@ -1,6 +1,6 @@
 ---
 id: DateBoxBase.Options.min
-type: Date | Number | String | undefined
+type: Date | Number | String | null | undefined
 default: undefined
 ---
 ---

api-reference/10 UI Components/dxCalendar/1 Configuration/max.md

@@ -1,6 +1,6 @@
 ---
 id: dxCalendar.Options.max
-type: Date | Number | String
+type: Date | Number | String | null
 default: new Date(3000, 0)
 ---
 ---

api-reference/10 UI Components/dxCalendar/1 Configuration/min.md

@@ -1,6 +1,6 @@
 ---
 id: dxCalendar.Options.min
-type: Date | Number | String
+type: Date | Number | String | null
 default: new Date(1000, 0)
 ---
 ---

api-reference/10 UI Components/dxCalendar/1 Configuration/value.md

@@ -1,6 +1,6 @@
 ---
 id: dxCalendar.Options.value
-type: Date | Number | String | Array<Date, Number, String>
+type: Date | Number | String | null | Array<Date, Number, String, null>
 default: null
 ---
 ---

api-reference/10 UI Components/dxCalendar/3 Methods/reset(value).md

@@ -5,7 +5,7 @@ id: dxCalendar.reset(value)
 ##### shortDescription
 Resets the [value](/api-reference/10%20UI%20Components/dxCalendar/1%20Configuration/value.md '{basewidgetpath}/Configuration/#value') property to the value passed as an argument.
 
-##### param(value): Date | Number | String | Array<Date, Number, String> | null
+##### param(value): Date | Number | String | Array<Date, Number, String, null> | null
 Specifies the new value.
 
 ---

api-reference/10 UI Components/dxDateBox/1 Configuration/value.md

@@ -1,6 +1,6 @@
 ---
 id: dxDateBox.Options.value
-type: Date | Number | String
+type: Date | Number | String | null
 default: null
 ---
 ---

api-reference/10 UI Components/dxDateRangeBox/1 Configuration/endDate.md

@@ -1,6 +1,6 @@
 ---
 id: dxDateRangeBox.Options.endDate
-type: Date | Number | String
+type: Date | Number | String | null
 default: null
 firedEvents: optionChanged
 ---

api-reference/10 UI Components/dxDateRangeBox/1 Configuration/startDate.md

@@ -1,6 +1,6 @@
 ---
 id: dxDateRangeBox.Options.startDate
-type: Date | Number | String
+type: Date | Number | String | null
 default: null
 firedEvents: optionChanged
 ---

api-reference/10 UI Components/dxDateRangeBox/1 Configuration/value.md

@@ -1,6 +1,6 @@
 ---
 id: dxDateRangeBox.Options.value
-type: Array<Date, Number, String>
+type: Array<Date, Number, String, null>
 default: [null,null]
 ---
 ---