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sfActionStack keeps a list of all requested actions and provides accessor
Adds an entry to the action stack.
returns sfActionStackEntry instance
Retrieves the entry at a specific index.
returns An action stack entry implementation.
Retrieves the first entry.
returns An action stack entry implementation or null if there is no sfAction instance in the stack
Retrieves the last entry.
Retrieves the size of this stack.
returns The size of this stack.
Removes the entry at a specific index.
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