g-variant-type-is-subtype-of (vtype supertype)

vtype -- a g-variant-type instance
supertype -- a g-variant-type instance

True if vtype is a subtype of supertype.

Checks if vtype is a subtype of supertype.

This function returns true if vtype is a subtype of supertype. All types are considered to be subtypes of themselves. Aside from that, only indefinite types can have subtypes.