JBLeaf
A leaf in the inbox or outbox tree of a JBSucker. Used to claim tokens from the inbox tree.
Notes:
- 
member: index The index of the leaf.
 - 
member: beneficiary The beneficiary of the leaf.
 - 
member: projectTokenCount The number of project tokens to claim.
 - 
member: terminalTokenAmount The amount of terminal tokens to claim.
 
struct JBLeaf {
    uint256 index;
    address beneficiary;
    uint256 projectTokenCount;
    uint256 terminalTokenAmount;
}