#[repr(C)]
pub struct dqblk {
    pub dqb_bhardlimit: u64,
    pub dqb_bsoftlimit: u64,
    pub dqb_curspace: u64,
    pub dqb_ihardlimit: u64,
    pub dqb_isoftlimit: u64,
    pub dqb_curinodes: u64,
    pub dqb_btime: u64,
    pub dqb_itime: u64,
    pub dqb_valid: u32,
}
Performs copy-assignment from 
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Immutably borrows from an owned value. 
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Mutably borrows from an owned value. 
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Returns the argument unchanged.
Calls U::from(self).
That is, this conversion is whatever the implementation of
From<T> for U chooses to do.
The type returned in the event of a conversion error.
Performs the conversion.
The type returned in the event of a conversion error.
Performs the conversion.