Support for Possessive Repetitions

[DecimalTurn]

At the moment, possessive repetitions (aka. possessive qualifiers) are not supported by RE2:

Possessive repetitions:
x*+	zero or more x, possessive
x++	one or more x, possessive
x?+	zero or one x, possessive
x{n,m}+	n or ... or m x, possessive
x{n,}+	n or more x, possessive
x{n}+	exactly n x, possessive

Are there any plans for supporting possessive repetitions in the future? I understand that RE2 has no intentions to support lookarounds as expressed here because it forces the use of backtracking, but possessive qualifiers are exactly the opposite and are in line with that philosophy.