EditorGUI.GetPropertyHeight
static function GetPropertyHeight(property: SerializedProperty, label: GUIContent = null, includeChildren: bool = true): float;
static float GetPropertyHeight(SerializedProperty property, GUIContent label = null, bool includeChildren = true);
static def GetPropertyHeight(property as SerializedProperty, label as GUIContent = null, includeChildren as bool = true) as float
Parameters

property Height of the property area.
label Descriptive text or image.
includeChildren Should the returned height include the height of child properties?
Description

Get the height needed for a PropertyField control.

The height is based on the type of the SerializedProperty, and inclues the height of all expanded children if the includeChildren parameter is set to true, which is the default. If the property has a custom PropertyDrawer, the function will return the height returned by that drawer. The includeChildren parameter is ignored in that case, as PropertyDrawers always include children.