GroupLayer:SetGroupMask - MohoScripting.com

GroupLayer:SetGroupMask(mask)

Version added: before 9.5

Sets the group masking mode. 0=none, 1=all visible, 2=all invisible

Argument	Type	Description	Default	Ver
mask	int32	The group's masking mode		< 9.5

Return type : none

String "SetGroupMask" is found in the following scripts:

Mask Settings (by Lukas)

SS - SVG Import (by simplsam)